We look at the division of 87509374 by 855 
The aim is to understand the frequency of 855 in 87509374.

Advancing to step 1:
When dividing 8 by 855, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 855

Going ahead to step 2:
The number 855 fits into 87 0 times, leaving a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Include the next digit (5) from the dividend after 87, then repeat: 875 / 855

On to step 3:
The number 855 fits into 875 1 times, leaving a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 855 from 875 leaves us with 20.
Append the next digit (0) from the dividend to 20 and continue with: 200 / 855

On to step 4:
855 goes into 200 0 times with a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 200 to get 200.
Grab the next digit (9) from the dividend, add it to 200, then carry on: 2009 / 855

Let's proceed to step 5:
When dividing 2009 by 855, we get 2 with a remainder of 299.
Record the quotient 2 as the next digit in the result. 
Result so far: 102.0
Deduct 1710 from 2009 and we're left with 299.
Append the next digit (3) from the dividend to 299 and continue with: 2993 / 855

Going ahead to step 6:
855 goes into 2993 3 times with a remainder of 428.
Write down 3 as next digit of the result. 
Result so far: 1023.0
If we take 2565 away from 2993, we end up with 428.
Append the next digit (7) from the dividend to 428 and continue with: 4287 / 855

On to step 7:
When dividing 4287 by 855, we get 5 with a remainder of 12.
Write down 5 as next digit of the result. 
Result so far: 10235.0
Deduct 4275 from 4287 and we're left with 12.
Fetch the next digit (4) from the dividend, attach it to 12 and continue: 124 / 855

Going ahead to step 8:
124 divided by 855 is 0 with a remainder of 124.
The next digit of our result is 0. 
Result so far: 102350.0
Subtracting 0 from 124 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Going ahead to step 9:
The number 855 fits into 1240 1 times, leaving a remainder of 385.
Use 1 as the next digit of our solution. 
Result so far: 102350.1
Subtracting 855 from 1240 leaves us with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Going ahead to step 10:
855 can be fit into 3850 4 times, resulting in a remainder of 430.
Put 4 as the next digit of the answer. 
Result so far: 102350.14
Deduct 3420 from 3850 and we're left with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Step 11:
When dividing 4300 by 855, we get 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 102350.145
Deduct 4275 from 4300 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 12:
If we divide 250 by 855, we get 0 and a remainder of 250.
The next digit of our result is 0. 
Result so far: 102350.145
If we subtract 0 from 250, we get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 13:
2500 divided by 855 is 2 with a remainder of 790.
Put 2 as the next digit of the answer. 
Result so far: 102350.14502
The remainder is 790 after subtracting 1710 from 2500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Moving on to step 14:
If we divide 7900 by 855, we get 9 and a remainder of 205.
Record the quotient 9 as the next digit in the result. 
Result so far: 102350.145029
Deduct 7695 from 7900 and we're left with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Step 15:
855 can be fit into 2050 2 times, resulting in a remainder of 340.
Write down 2 as next digit of the result. 
Result so far: 102350.1450292
Subtracting 1710 from 2050 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 16:
855 goes into 3400 3 times with a remainder of 835.
Put 3 as the next digit of the answer. 
Result so far: 102350.14502923
If we subtract 2565 from 3400, we get 835.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8350, and continue the process.

Our division results in 102350.14502923 with a remaining 8.35e-07.