879844 divided by 51 
The aim is to understand the frequency of 51 in 879844.

On to 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
Deduct 0 from 8 and we're left with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 51

On to step 2:
If we divide 87 by 51, we get 1 and a remainder of 36.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 51 from 87 leaves us with 36.
Include the next digit (9) from the dividend after 36, then repeat: 369 / 51

Moving on to step 3:
51 can be fit into 369 7 times, resulting in a remainder of 12.
The next digit of our result is 7. 
Result so far: 17.0
If we subtract 357 from 369, we get 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 51

Let's proceed to step 4:
If we divide 128 by 51, we get 2 and a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 172.0
Deduct 102 from 128 and we're left with 26.
Append the next digit (4) from the dividend to 26 and continue with: 264 / 51

Let's proceed to step 5:
264 divided by 51 is 5 with a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 1725.0
If we subtract 255 from 264, we get 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 51

On to step 6:
51 can be fit into 94 1 times, resulting in a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 17251.0
If we take 51 away from 94, 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.

Advancing to step 7:
51 can be fit into 430 8 times, resulting in a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 17251.8
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.

Going ahead to step 8:
220 divided by 51 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 17251.84
Deduct 204 from 220 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
If we divide 160 by 51, we get 3 and a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 17251.843
The remainder is 7 after subtracting 153 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 10:
70 divided by 51 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 17251.8431
If we subtract 51 from 70, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 11:
51 goes into 190 3 times with a remainder of 37.
Write down 3 as next digit of the result. 
Result so far: 17251.84313
Subtract 153 from 190 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.

Advancing to step 12:
When dividing 370 by 51, we get 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 17251.843137
Deduct 357 from 370 and we're left 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.

Step 13:
51 can be fit into 130 2 times, resulting in a remainder of 28.
The next digit of our result is 2. 
Result so far: 17251.8431372
If we subtract 102 from 130, we get 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 14:
If we divide 280 by 51, we get 5 and a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 17251.84313725
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.

After the division, we end up with 17251.84313725 and a remainder of 2.5e-08.