912689 divided by 51 
The aim is to understand the frequency of 51 in 912689.

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.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 51

Going ahead to step 2:
51 can be fit into 91 1 times, resulting in a remainder of 40.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 51 from 91 and we're left with 40.
Bring next digit (2) of the dividend behind the 40 and repeat the process: 402 / 51

On to step 3:
51 goes into 402 7 times with a remainder of 45.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we take 357 away from 402, we end up with 45.
Bring next digit (6) of the dividend behind the 45 and repeat the process: 456 / 51

Moving on to step 4:
The number 51 fits into 456 8 times, leaving a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 178.0
If we subtract 408 from 456, we get 48.
Grab the next digit (8) from the dividend, add it to 48, then carry on: 488 / 51

Advancing to step 5:
If we divide 488 by 51, we get 9 and a remainder of 29.
Write down 9 as next digit of the result. 
Result so far: 1789.0
If we take 459 away from 488, we end up with 29.
Grab the next digit (9) from the dividend, add it to 29, then carry on: 299 / 51

Going ahead to step 6:
51 can be fit into 299 5 times, resulting in a remainder of 44.
Put 5 as the next digit of the answer. 
Result so far: 17895.0
Subtracting 255 from 299 leaves us 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.

Step 7:
51 can be fit into 440 8 times, resulting in a remainder of 32.
The next digit of our result is 8. 
Result so far: 17895.8
Subtract 408 from 440 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 8:
The number 51 fits into 320 6 times, leaving a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 17895.86
Subtracting 306 from 320 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 9:
51 goes into 140 2 times with a remainder of 38.
Write down 2 as next digit of the result. 
Result so far: 17895.862
The remainder is 38 after subtracting 102 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 10:
If we divide 380 by 51, we get 7 and a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 17895.8627
Subtracting 357 from 380 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 11:
If we divide 230 by 51, we get 4 and a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 17895.86274
Subtract 204 from 230 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 12:
51 can be fit into 260 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 17895.862745
Subtract 255 from 260 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 13:
51 goes into 50 0 times with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 17895.862745
Subtracting 0 from 50 leaves us 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.

Going ahead to step 14:
500 divided by 51 is 9 with a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 17895.86274509
If we subtract 459 from 500, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

The final result is 17895.86274509 with a remainder of 4.1e-08.