We look at the division of 85870815 by 884 
The aim is to understand the frequency of 884 in 85870815.

Going ahead to step 1:
If we divide 8 by 884, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 884

On to step 2:
When dividing 85 by 884, we get 0 with a remainder of 85.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 85, we end up with 85.
Bring next digit (8) of the dividend behind the 85 and repeat the process: 858 / 884

Step 3:
If we divide 858 by 884, we get 0 and a remainder of 858.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 858 leaves us with 858.
Grab the next digit (7) from the dividend, add it to 858, then carry on: 8587 / 884

Moving on to step 4:
When dividing 8587 by 884, we get 9 with a remainder of 631.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 7956 from 8587 leaves us with 631.
Grab the next digit (0) from the dividend, add it to 631, then carry on: 6310 / 884

Advancing to step 5:
When dividing 6310 by 884, we get 7 with a remainder of 122.
Put 7 as the next digit of the answer. 
Result so far: 97.0
If we take 6188 away from 6310, we end up with 122.
Append the next digit (8) from the dividend to 122 and continue with: 1228 / 884

Moving on to step 6:
884 goes into 1228 1 times with a remainder of 344.
Use 1 as the next digit of our solution. 
Result so far: 971.0
If we subtract 884 from 1228, we get 344.
Grab the next digit (1) from the dividend, add it to 344, then carry on: 3441 / 884

Going ahead to step 7:
3441 divided by 884 is 3 with a remainder of 789.
Record the quotient 3 as the next digit in the result. 
Result so far: 9713.0
Subtract 2652 from 3441 to get 789.
Fetch the next digit (5) from the dividend, attach it to 789 and continue: 7895 / 884

Step 8:
If we divide 7895 by 884, we get 8 and a remainder of 823.
Record the quotient 8 as the next digit in the result. 
Result so far: 97138.0
If we subtract 7072 from 7895, we get 823.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8230, and continue the process.

Moving on to step 9:
884 goes into 8230 9 times with a remainder of 274.
Write down 9 as next digit of the result. 
Result so far: 97138.9
If we subtract 7956 from 8230, we get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Step 10:
2740 divided by 884 is 3 with a remainder of 88.
Write down 3 as next digit of the result. 
Result so far: 97138.93
If we take 2652 away from 2740, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

On to step 11:
When dividing 880 by 884, we get 0 with a remainder of 880.
Write down 0 as next digit of the result. 
Result so far: 97138.93
If we subtract 0 from 880, we get 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8800, and continue the process.

Step 12:
The number 884 fits into 8800 9 times, leaving a remainder of 844.
The number 9 becomes the next digit in our result. 
Result so far: 97138.9309
If we subtract 7956 from 8800, we get 844.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8440, and continue the process.

Advancing to step 13:
884 goes into 8440 9 times with a remainder of 484.
The next digit of our result is 9. 
Result so far: 97138.93099
If we subtract 7956 from 8440, we get 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

The final result is 97138.93099 with a remainder of 0.000484.