43791964 divided by 51 
The aim is to understand the frequency of 51 in 43791964.

Going ahead to step 1:
When dividing 4 by 51, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 51

Moving on to step 2:
43 divided by 51 is 0 with a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Grab the next digit (7) from the dividend, add it to 43, then carry on: 437 / 51

Going ahead to step 3:
If we divide 437 by 51, we get 8 and a remainder of 29.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 29 after subtracting 408 from 437.
Bring next digit (9) of the dividend behind the 29 and repeat the process: 299 / 51

On to step 4:
299 divided by 51 is 5 with a remainder of 44.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
If we subtract 255 from 299, we get 44.
Fetch the next digit (1) from the dividend, attach it to 44 and continue: 441 / 51

Let's proceed to step 5:
If we divide 441 by 51, we get 8 and a remainder of 33.
Put 8 as the next digit of the answer. 
Result so far: 858.0
Deduct 408 from 441 and we're left with 33.
Append the next digit (9) from the dividend to 33 and continue with: 339 / 51

Advancing to step 6:
51 goes into 339 6 times with a remainder of 33.
The number 6 becomes the next digit in our result. 
Result so far: 8586.0
Subtracting 306 from 339 leaves us with 33.
Bring next digit (6) of the dividend behind the 33 and repeat the process: 336 / 51

Going ahead to step 7:
If we divide 336 by 51, we get 6 and a remainder of 30.
The number 6 becomes the next digit in our result. 
Result so far: 85866.0
Subtracting 306 from 336 leaves us with 30.
Bring next digit (4) of the dividend behind the 30 and repeat the process: 304 / 51

On to step 8:
51 can be fit into 304 5 times, resulting in a remainder of 49.
The number 5 becomes the next digit in our result. 
Result so far: 858665.0
If we take 255 away from 304, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 9:
490 divided by 51 is 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 858665.9
Deduct 459 from 490 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 10:
51 goes into 310 6 times with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 858665.96
If we take 306 away from 310, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 11:
The number 51 fits into 40 0 times, leaving a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 858665.96
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 12:
51 goes into 400 7 times with a remainder of 43.
The next digit of our result is 7. 
Result so far: 858665.9607
If we take 357 away from 400, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 13:
If we divide 430 by 51, we get 8 and a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 858665.96078
If we take 408 away from 430, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 14:
If we divide 220 by 51, we get 4 and a remainder of 16.
The next digit of our result is 4. 
Result so far: 858665.960784
Subtract 204 from 220 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 15:
51 goes into 160 3 times with a remainder of 7.
The next digit of our result is 3. 
Result so far: 858665.9607843
If we subtract 153 from 160, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 16:
51 goes into 70 1 times with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 858665.96078431
If we take 51 away from 70, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The quotient of the division is 858665.96078431, and the remainder is 1.9e-08.