We look at the division of 852659 by 51 
The aim is to understand the frequency of 51 in 852659.

On to step 1:
If we divide 8 by 51, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 51

Going ahead to step 2:
The number 51 fits into 85 1 times, leaving a remainder of 34.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 51 from 85 and we're left with 34.
Append the next digit (2) from the dividend to 34 and continue with: 342 / 51

Step 3:
51 can be fit into 342 6 times, resulting in a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 16.0
The remainder is 36 after subtracting 306 from 342.
Fetch the next digit (6) from the dividend, attach it to 36 and continue: 366 / 51

Going ahead to step 4:
The number 51 fits into 366 7 times, leaving a remainder of 9.
The next digit of our result is 7. 
Result so far: 167.0
Subtract 357 from 366 to get 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 51

Advancing to step 5:
If we divide 95 by 51, we get 1 and a remainder of 44.
Use 1 as the next digit of our solution. 
Result so far: 1671.0
Subtract 51 from 95 to get 44.
Append the next digit (9) from the dividend to 44 and continue with: 449 / 51

On to step 6:
When dividing 449 by 51, we get 8 with a remainder of 41.
Use 8 as the next digit of our solution. 
Result so far: 16718.0
Subtracting 408 from 449 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 7:
If we divide 410 by 51, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 16718.8
Subtract 408 from 410 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
The number 51 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 16718.8
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 9:
If we divide 200 by 51, we get 3 and a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 16718.803
If we subtract 153 from 200, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 10:
470 divided by 51 is 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 16718.8039
Subtracting 459 from 470 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 11:
110 divided by 51 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 16718.80392
Subtract 102 from 110 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
If we divide 80 by 51, we get 1 and a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 16718.803921
If we take 51 away from 80, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 13:
51 goes into 290 5 times with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 16718.8039215
Subtracting 255 from 290 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 14:
If we divide 350 by 51, we get 6 and a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 16718.80392156
If we take 306 away from 350, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 16718.80392156, with a leftover of 4.4e-08.