We look at the division of 79413628 by 873 
The aim is to understand the frequency of 873 in 79413628.

Moving on to step 1:
When dividing 7 by 873, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 873

On to step 2:
The number 873 fits into 79 0 times, leaving a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 79 and we're left with 79.
Grab the next digit (4) from the dividend, add it to 79, then carry on: 794 / 873

On to step 3:
873 can be fit into 794 0 times, resulting in a remainder of 794.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 794 after subtracting 0 from 794.
Include the next digit (1) from the dividend after 794, then repeat: 7941 / 873

Advancing to step 4:
873 goes into 7941 9 times with a remainder of 84.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we take 7857 away from 7941, we end up with 84.
Grab the next digit (3) from the dividend, add it to 84, then carry on: 843 / 873

Going ahead to step 5:
When dividing 843 by 873, we get 0 with a remainder of 843.
Use 0 as the next digit of our solution. 
Result so far: 90.0
The remainder is 843 after subtracting 0 from 843.
Append the next digit (6) from the dividend to 843 and continue with: 8436 / 873

Step 6:
873 goes into 8436 9 times with a remainder of 579.
Write down 9 as next digit of the result. 
Result so far: 909.0
Deduct 7857 from 8436 and we're left with 579.
Bring next digit (2) of the dividend behind the 579 and repeat the process: 5792 / 873

Moving on to step 7:
873 goes into 5792 6 times with a remainder of 554.
The next digit of our result is 6. 
Result so far: 9096.0
Subtracting 5238 from 5792 leaves us with 554.
Take the next digit (8) from the dividend and append it to 554, then repeat: 5548 / 873

On to step 8:
The number 873 fits into 5548 6 times, leaving a remainder of 310.
The next digit of our result is 6. 
Result so far: 90966.0
Deduct 5238 from 5548 and we're left with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Moving on to step 9:
3100 divided by 873 is 3 with a remainder of 481.
Use 3 as the next digit of our solution. 
Result so far: 90966.3
If we subtract 2619 from 3100, we get 481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4810, and continue the process.

Moving on to step 10:
4810 divided by 873 is 5 with a remainder of 445.
The number 5 becomes the next digit in our result. 
Result so far: 90966.35
If we take 4365 away from 4810, we end up with 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

On to step 11:
873 can be fit into 4450 5 times, resulting in a remainder of 85.
The number 5 becomes the next digit in our result. 
Result so far: 90966.355
If we take 4365 away from 4450, we end up with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

The quotient of the division is 90966.355, and the remainder is 0.0085.