90688012 ÷ 855 
The aim is to understand the frequency of 855 in 90688012.

Moving on to step 1:
9 divided by 855 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 855

Moving on to step 2:
The number 855 fits into 90 0 times, leaving a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Take the next digit (6) from the dividend and append it to 90, then repeat: 906 / 855

Moving on to step 3:
906 divided by 855 is 1 with a remainder of 51.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 855 away from 906, we end up with 51.
Bring next digit (8) of the dividend behind the 51 and repeat the process: 518 / 855

Let's proceed to step 4:
518 divided by 855 is 0 with a remainder of 518.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
The remainder is 518 after subtracting 0 from 518.
Grab the next digit (8) from the dividend, add it to 518, then carry on: 5188 / 855

On to step 5:
When dividing 5188 by 855, we get 6 with a remainder of 58.
Write down 6 as next digit of the result. 
Result so far: 106.0
Deduct 5130 from 5188 and we're left with 58.
Bring next digit (0) of the dividend behind the 58 and repeat the process: 580 / 855

Let's proceed to step 6:
855 goes into 580 0 times with a remainder of 580.
Put 0 as the next digit of the answer. 
Result so far: 1060.0
The remainder is 580 after subtracting 0 from 580.
Take the next digit (1) from the dividend and append it to 580, then repeat: 5801 / 855

On to step 7:
If we divide 5801 by 855, we get 6 and a remainder of 671.
Record the quotient 6 as the next digit in the result. 
Result so far: 10606.0
If we subtract 5130 from 5801, we get 671.
Grab the next digit (2) from the dividend, add it to 671, then carry on: 6712 / 855

Let's proceed to step 8:
6712 divided by 855 is 7 with a remainder of 727.
Put 7 as the next digit of the answer. 
Result so far: 106067.0
Deduct 5985 from 6712 and we're left with 727.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7270, and continue the process.

Going ahead to step 9:
When dividing 7270 by 855, we get 8 with a remainder of 430.
Record the quotient 8 as the next digit in the result. 
Result so far: 106067.8
If we take 6840 away from 7270, we end up 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 10:
855 can be fit into 4300 5 times, resulting in a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 106067.85
If we subtract 4275 from 4300, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 11:
When dividing 250 by 855, we get 0 with a remainder of 250.
The next digit of our result is 0. 
Result so far: 106067.85
Subtract 0 from 250 to 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.

On to step 12:
2500 divided by 855 is 2 with a remainder of 790.
The number 2 becomes the next digit in our result. 
Result so far: 106067.8502
Deduct 1710 from 2500 and we're left with 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Let's proceed to step 13:
If we divide 7900 by 855, we get 9 and a remainder of 205.
The number 9 becomes the next digit in our result. 
Result so far: 106067.85029
If we subtract 7695 from 7900, we get 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 14:
855 can be fit into 2050 2 times, resulting in a remainder of 340.
The number 2 becomes the next digit in our result. 
Result so far: 106067.850292
The remainder is 340 after subtracting 1710 from 2050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 15:
If we divide 3400 by 855, we get 3 and a remainder of 835.
Put 3 as the next digit of the answer. 
Result so far: 106067.8502923
Subtract 2565 from 3400 to 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.

On to step 16:
When dividing 8350 by 855, we get 9 with a remainder of 655.
Write down 9 as next digit of the result. 
Result so far: 106067.85029239
Subtracting 7695 from 8350 leaves us with 655.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6550, and continue the process.

The final result is 106067.85029239 with a remainder of 6.55e-07.