We look at the division of 10900872 by 879 
The aim is to understand the frequency of 879 in 10900872.

Let's proceed to step 1:
879 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 879

Going ahead to step 2:
The number 879 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 10 after subtracting 0 from 10.
Take the next digit (9) from the dividend and append it to 10, then repeat: 109 / 879

Moving on to step 3:
109 divided by 879 is 0 with a remainder of 109.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 109, we get 109.
Take the next digit (0) from the dividend and append it to 109, then repeat: 1090 / 879

On to step 4:
879 goes into 1090 1 times with a remainder of 211.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 879 from 1090 to get 211.
Append the next digit (0) from the dividend to 211 and continue with: 2110 / 879

Let's proceed to step 5:
When dividing 2110 by 879, we get 2 with a remainder of 352.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 1758 from 2110 to get 352.
Include the next digit (8) from the dividend after 352, then repeat: 3528 / 879

Moving on to step 6:
3528 divided by 879 is 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 124.0
Deduct 3516 from 3528 and we're left with 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 879

On to step 7:
If we divide 127 by 879, we get 0 and a remainder of 127.
Put 0 as the next digit of the answer. 
Result so far: 1240.0
Subtract 0 from 127 to get 127.
Fetch the next digit (2) from the dividend, attach it to 127 and continue: 1272 / 879

Advancing to step 8:
1272 divided by 879 is 1 with a remainder of 393.
The number 1 becomes the next digit in our result. 
Result so far: 12401.0
If we take 879 away from 1272, we end up with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Advancing to step 9:
When dividing 3930 by 879, we get 4 with a remainder of 414.
Record the quotient 4 as the next digit in the result. 
Result so far: 12401.4
If we take 3516 away from 3930, we end up with 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Step 10:
When dividing 4140 by 879, we get 4 with a remainder of 624.
Use 4 as the next digit of our solution. 
Result so far: 12401.44
Deduct 3516 from 4140 and we're left with 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

The quotient of the division is 12401.44, and the remainder is 0.624.