Let's divide 809968 by 51
The aim is to understand the frequency of 51 in 809968.

Step 1:
51 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 51

Moving on to step 2:
The number 51 fits into 80 1 times, leaving a remainder of 29.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 51 from 80 and we're left with 29.
Append the next digit (9) from the dividend to 29 and continue with: 299 / 51

Step 3:
The number 51 fits into 299 5 times, leaving a remainder of 44.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtracting 255 from 299 leaves us with 44.
Grab the next digit (9) from the dividend, add it to 44, then carry on: 449 / 51

Advancing to step 4:
The number 51 fits into 449 8 times, leaving a remainder of 41.
Write down 8 as next digit of the result. 
Result so far: 158.0
Subtracting 408 from 449 leaves us with 41.
Fetch the next digit (6) from the dividend, attach it to 41 and continue: 416 / 51

Advancing to step 5:
51 goes into 416 8 times with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 1588.0
If we take 408 away from 416, we end up with 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 51

Advancing to step 6:
When dividing 88 by 51, we get 1 with a remainder of 37.
Use 1 as the next digit of our solution. 
Result so far: 15881.0
Subtract 51 from 88 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 7:
If we divide 370 by 51, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 15881.7
If we take 357 away from 370, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 8:
If we divide 130 by 51, we get 2 and a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 15881.72
Deduct 102 from 130 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 9:
If we divide 280 by 51, we get 5 and a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 15881.725
The remainder is 25 after subtracting 255 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 10:
The number 51 fits into 250 4 times, leaving a remainder of 46.
Write down 4 as next digit of the result. 
Result so far: 15881.7254
Deduct 204 from 250 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 11:
The number 51 fits into 460 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 15881.72549
Deduct 459 from 460 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 12:
The number 51 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 15881.72549
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
If we divide 100 by 51, we get 1 and a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 15881.7254901
The remainder is 49 after subtracting 51 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 14:
The number 51 fits into 490 9 times, leaving a remainder of 31.
Use 9 as the next digit of our solution. 
Result so far: 15881.72549019
The remainder is 31 after subtracting 459 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The quotient of the division is 15881.72549019, and the remainder is 3.1e-08.