985931 divided by 51 
The aim is to understand the frequency of 51 in 985931.

Going ahead to step 1:
9 divided by 51 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 51

Advancing to step 2:
If we divide 98 by 51, we get 1 and a remainder of 47.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 51 from 98 to get 47.
Grab the next digit (5) from the dividend, add it to 47, then carry on: 475 / 51

On to step 3:
The number 51 fits into 475 9 times, leaving a remainder of 16.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 459 from 475 leaves us with 16.
Fetch the next digit (9) from the dividend, attach it to 16 and continue: 169 / 51

On to step 4:
The number 51 fits into 169 3 times, leaving a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 193.0
Subtract 153 from 169 to get 16.
Bring next digit (3) of the dividend behind the 16 and repeat the process: 163 / 51

Step 5:
The number 51 fits into 163 3 times, leaving a remainder of 10.
The next digit of our result is 3. 
Result so far: 1933.0
Subtracting 153 from 163 leaves us with 10.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 51

Advancing to step 6:
If we divide 101 by 51, we get 1 and a remainder of 50.
Put 1 as the next digit of the answer. 
Result so far: 19331.0
Deduct 51 from 101 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 7:
The number 51 fits into 500 9 times, leaving a remainder of 41.
Use 9 as the next digit of our solution. 
Result so far: 19331.9
The remainder is 41 after subtracting 459 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 8:
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: 19331.98
The remainder is 2 after subtracting 408 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
51 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 19331.98
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
51 goes into 200 3 times with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 19331.9803
If we take 153 away from 200, we end up with 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 11:
51 can be fit into 470 9 times, resulting in a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 19331.98039
The remainder is 11 after subtracting 459 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 12:
51 can be fit into 110 2 times, resulting in a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 19331.980392
Subtracting 102 from 110 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 13:
51 can be fit into 80 1 times, resulting in a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 19331.9803921
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.

Going ahead to step 14:
290 divided by 51 is 5 with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 19331.98039215
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.

The final outcome is 19331.98039215, with a leftover of 3.5e-08.