We're dividing 860850 by 51 
The aim is to understand the frequency of 51 in 860850.

Step 1:
When dividing 8 by 51, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 51

On to step 2:
51 goes into 86 1 times with a remainder of 35.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 35 after subtracting 51 from 86.
Include the next digit (0) from the dividend after 35, then repeat: 350 / 51

Moving on to step 3:
When dividing 350 by 51, we get 6 with a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtract 306 from 350 to get 44.
Append the next digit (8) from the dividend to 44 and continue with: 448 / 51

Advancing to step 4:
51 goes into 448 8 times with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 168.0
If we subtract 408 from 448, we get 40.
Include the next digit (5) from the dividend after 40, then repeat: 405 / 51

Let's proceed to step 5:
51 goes into 405 7 times with a remainder of 48.
Put 7 as the next digit of the answer. 
Result so far: 1687.0
The remainder is 48 after subtracting 357 from 405.
Include the next digit (0) from the dividend after 48, then repeat: 480 / 51

Let's proceed to step 6:
51 can be fit into 480 9 times, resulting in a remainder of 21.
The next digit of our result is 9. 
Result so far: 16879.0
Deduct 459 from 480 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
When dividing 210 by 51, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 16879.4
If we take 204 away from 210, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
If we divide 60 by 51, we get 1 and a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 16879.41
The remainder is 9 after subtracting 51 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
90 divided by 51 is 1 with a remainder of 39.
The next digit of our result is 1. 
Result so far: 16879.411
If we take 51 away from 90, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final outcome is 16879.411, with a leftover of 0.0039.