23098623 ÷ 646 
The aim is to understand the frequency of 646 in 23098623.

On to step 1:
If we divide 2 by 646, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 646

Moving on to step 2:
646 can be fit into 23 0 times, resulting in a remainder of 23.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 23, we get 23.
Grab the next digit (0) from the dividend, add it to 23, then carry on: 230 / 646

Going ahead to step 3:
646 goes into 230 0 times with a remainder of 230.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 230, we get 230.
Fetch the next digit (9) from the dividend, attach it to 230 and continue: 2309 / 646

On to step 4:
646 can be fit into 2309 3 times, resulting in a remainder of 371.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 1938 from 2309, we get 371.
Bring next digit (8) of the dividend behind the 371 and repeat the process: 3718 / 646

Moving on to step 5:
When dividing 3718 by 646, we get 5 with a remainder of 488.
Put 5 as the next digit of the answer. 
Result so far: 35.0
Subtracting 3230 from 3718 leaves us with 488.
Fetch the next digit (6) from the dividend, attach it to 488 and continue: 4886 / 646

Let's proceed to step 6:
646 goes into 4886 7 times with a remainder of 364.
Use 7 as the next digit of our solution. 
Result so far: 357.0
The remainder is 364 after subtracting 4522 from 4886.
Grab the next digit (2) from the dividend, add it to 364, then carry on: 3642 / 646

Moving on to step 7:
646 can be fit into 3642 5 times, resulting in a remainder of 412.
Put 5 as the next digit of the answer. 
Result so far: 3575.0
Subtract 3230 from 3642 to get 412.
Bring next digit (3) of the dividend behind the 412 and repeat the process: 4123 / 646

Let's proceed to step 8:
When dividing 4123 by 646, we get 6 with a remainder of 247.
Write down 6 as next digit of the result. 
Result so far: 35756.0
If we take 3876 away from 4123, we end up with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Let's proceed to step 9:
646 goes into 2470 3 times with a remainder of 532.
Write down 3 as next digit of the result. 
Result so far: 35756.3
Subtract 1938 from 2470 to get 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Step 10:
5320 divided by 646 is 8 with a remainder of 152.
Write down 8 as next digit of the result. 
Result so far: 35756.38
Deduct 5168 from 5320 and we're left with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Advancing to step 11:
When dividing 1520 by 646, we get 2 with a remainder of 228.
The next digit of our result is 2. 
Result so far: 35756.382
The remainder is 228 after subtracting 1292 from 1520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Step 12:
2280 divided by 646 is 3 with a remainder of 342.
Write down 3 as next digit of the result. 
Result so far: 35756.3823
Deduct 1938 from 2280 and we're left with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

On to step 13:
When dividing 3420 by 646, we get 5 with a remainder of 190.
Use 5 as the next digit of our solution. 
Result so far: 35756.38235
Subtracting 3230 from 3420 leaves us with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Step 14:
1900 divided by 646 is 2 with a remainder of 608.
Record the quotient 2 as the next digit in the result. 
Result so far: 35756.382352
If we take 1292 away from 1900, we end up with 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Moving on to step 15:
646 can be fit into 6080 9 times, resulting in a remainder of 266.
Use 9 as the next digit of our solution. 
Result so far: 35756.3823529
Subtract 5814 from 6080 to get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Moving on to step 16:
646 goes into 2660 4 times with a remainder of 76.
Use 4 as the next digit of our solution. 
Result so far: 35756.38235294
Subtract 2584 from 2660 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Our division results in 35756.38235294 with a remaining 7.6e-08.