861807 ÷ 51 
The aim is to understand the frequency of 51 in 861807.

Moving on to step 1:
8 divided by 51 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 51

Going ahead to step 2:
The number 51 fits into 86 1 times, leaving a remainder of 35.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 35 after subtracting 51 from 86.
Take the next digit (1) from the dividend and append it to 35, then repeat: 351 / 51

Let's proceed to step 3:
The number 51 fits into 351 6 times, leaving a remainder of 45.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Subtracting 306 from 351 leaves us with 45.
Take the next digit (8) from the dividend and append it to 45, then repeat: 458 / 51

Moving on to step 4:
458 divided by 51 is 8 with a remainder of 50.
The next digit of our result is 8. 
Result so far: 168.0
Subtracting 408 from 458 leaves us with 50.
Fetch the next digit (0) from the dividend, attach it to 50 and continue: 500 / 51

Going ahead to step 5:
500 divided by 51 is 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 1689.0
Subtract 459 from 500 to get 41.
Include the next digit (7) from the dividend after 41, then repeat: 417 / 51

Let's proceed to step 6:
417 divided by 51 is 8 with a remainder of 9.
Write down 8 as next digit of the result. 
Result so far: 16898.0
If we subtract 408 from 417, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
51 goes into 90 1 times with a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 16898.1
If we subtract 51 from 90, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 8:
If we divide 390 by 51, we get 7 and a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 16898.17
If we subtract 357 from 390, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 9:
51 goes into 330 6 times with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 16898.176
The remainder is 24 after subtracting 306 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 10:
When dividing 240 by 51, we get 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 16898.1764
If we subtract 204 from 240, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
When dividing 360 by 51, we get 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 16898.17647
The remainder is 3 after subtracting 357 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 12:
The number 51 fits into 30 0 times, leaving a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 16898.17647
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 13:
51 goes into 300 5 times with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 16898.1764705
If we subtract 255 from 300, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 14:
450 divided by 51 is 8 with a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 16898.17647058
If we subtract 408 from 450, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

In conclusion, the division gives 16898.17647058 with a balance of 4.2e-08.