We look at the division of 46512583 by 861 
The aim is to understand the frequency of 861 in 46512583.

Step 1:
861 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 861

Moving on to step 2:
The number 861 fits into 46 0 times, leaving a remainder of 46.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 46 and we're left with 46.
Grab the next digit (5) from the dividend, add it to 46, then carry on: 465 / 861

On to step 3:
When dividing 465 by 861, we get 0 with a remainder of 465.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 465 after subtracting 0 from 465.
Append the next digit (1) from the dividend to 465 and continue with: 4651 / 861

Moving on to step 4:
861 can be fit into 4651 5 times, resulting in a remainder of 346.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 4305 from 4651, we get 346.
Take the next digit (2) from the dividend and append it to 346, then repeat: 3462 / 861

Going ahead to step 5:
861 can be fit into 3462 4 times, resulting in a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 54.0
If we take 3444 away from 3462, we end up with 18.
Fetch the next digit (5) from the dividend, attach it to 18 and continue: 185 / 861

Moving on to step 6:
861 can be fit into 185 0 times, resulting in a remainder of 185.
Put 0 as the next digit of the answer. 
Result so far: 540.0
If we subtract 0 from 185, we get 185.
Bring next digit (8) of the dividend behind the 185 and repeat the process: 1858 / 861

Going ahead to step 7:
861 goes into 1858 2 times with a remainder of 136.
Use 2 as the next digit of our solution. 
Result so far: 5402.0
Subtract 1722 from 1858 to get 136.
Fetch the next digit (3) from the dividend, attach it to 136 and continue: 1363 / 861

Moving on to step 8:
The number 861 fits into 1363 1 times, leaving a remainder of 502.
The number 1 becomes the next digit in our result. 
Result so far: 54021.0
Subtract 861 from 1363 to get 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

On to step 9:
When dividing 5020 by 861, we get 5 with a remainder of 715.
Write down 5 as next digit of the result. 
Result so far: 54021.5
If we take 4305 away from 5020, we end up with 715.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7150, and continue the process.

Going ahead to step 10:
The number 861 fits into 7150 8 times, leaving a remainder of 262.
The number 8 becomes the next digit in our result. 
Result so far: 54021.58
If we take 6888 away from 7150, we end up with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Step 11:
If we divide 2620 by 861, we get 3 and a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 54021.583
If we take 2583 away from 2620, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 12:
When dividing 370 by 861, we get 0 with a remainder of 370.
The number 0 becomes the next digit in our result. 
Result so far: 54021.583
The remainder is 370 after subtracting 0 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Advancing to step 13:
The number 861 fits into 3700 4 times, leaving a remainder of 256.
Use 4 as the next digit of our solution. 
Result so far: 54021.58304
The remainder is 256 after subtracting 3444 from 3700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Advancing to step 14:
861 goes into 2560 2 times with a remainder of 838.
Put 2 as the next digit of the answer. 
Result so far: 54021.583042
Deduct 1722 from 2560 and we're left with 838.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8380, and continue the process.

Advancing to step 15:
861 can be fit into 8380 9 times, resulting in a remainder of 631.
Record the quotient 9 as the next digit in the result. 
Result so far: 54021.5830429
If we subtract 7749 from 8380, we get 631.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6310, and continue the process.

Advancing to step 16:
If we divide 6310 by 861, we get 7 and a remainder of 283.
The number 7 becomes the next digit in our result. 
Result so far: 54021.58304297
Subtracting 6027 from 6310 leaves us with 283.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

The final result is 54021.58304297 with a remainder of 2.83e-07.