81900596 ÷ 855 
The aim is to understand the frequency of 855 in 81900596.

Going ahead to step 1:
When dividing 8 by 855, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 855

Going ahead to step 2:
855 can be fit into 81 0 times, resulting in a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Fetch the next digit (9) from the dividend, attach it to 81 and continue: 819 / 855

Advancing to step 3:
855 can be fit into 819 0 times, resulting in a remainder of 819.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 819 leaves us with 819.
Take the next digit (0) from the dividend and append it to 819, then repeat: 8190 / 855

Moving on to step 4:
855 can be fit into 8190 9 times, resulting in a remainder of 495.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 7695 from 8190, we get 495.
Fetch the next digit (0) from the dividend, attach it to 495 and continue: 4950 / 855

Going ahead to step 5:
If we divide 4950 by 855, we get 5 and a remainder of 675.
Put 5 as the next digit of the answer. 
Result so far: 95.0
Deduct 4275 from 4950 and we're left with 675.
Include the next digit (5) from the dividend after 675, then repeat: 6755 / 855

Let's proceed to step 6:
If we divide 6755 by 855, we get 7 and a remainder of 770.
Write down 7 as next digit of the result. 
Result so far: 957.0
If we take 5985 away from 6755, we end up with 770.
Bring next digit (9) of the dividend behind the 770 and repeat the process: 7709 / 855

Let's proceed to step 7:
When dividing 7709 by 855, we get 9 with a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 9579.0
Deduct 7695 from 7709 and we're left with 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 855

Step 8:
The number 855 fits into 146 0 times, leaving a remainder of 146.
Record the quotient 0 as the next digit in the result. 
Result so far: 95790.0
Deduct 0 from 146 and we're left with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Going ahead to step 9:
The number 855 fits into 1460 1 times, leaving a remainder of 605.
Write down 1 as next digit of the result. 
Result so far: 95790.1
The remainder is 605 after subtracting 855 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6050, and continue the process.

Going ahead to step 10:
6050 divided by 855 is 7 with a remainder of 65.
Use 7 as the next digit of our solution. 
Result so far: 95790.17
Subtract 5985 from 6050 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 11:
650 divided by 855 is 0 with a remainder of 650.
The next digit of our result is 0. 
Result so far: 95790.17
Deduct 0 from 650 and we're left with 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

Moving on to step 12:
6500 divided by 855 is 7 with a remainder of 515.
Put 7 as the next digit of the answer. 
Result so far: 95790.1707
If we take 5985 away from 6500, we end up with 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

On to step 13:
If we divide 5150 by 855, we get 6 and a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 95790.17076
If we subtract 5130 from 5150, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 14:
855 can be fit into 200 0 times, resulting in a remainder of 200.
The next digit of our result is 0. 
Result so far: 95790.17076
Subtracting 0 from 200 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 15:
If we divide 2000 by 855, we get 2 and a remainder of 290.
Record the quotient 2 as the next digit in the result. 
Result so far: 95790.1707602
Deduct 1710 from 2000 and we're left with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 16:
The number 855 fits into 2900 3 times, leaving a remainder of 335.
Write down 3 as next digit of the result. 
Result so far: 95790.17076023
If we take 2565 away from 2900, we end up with 335.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3350, and continue the process.

After the division, we end up with 95790.17076023 and a remainder of 3.35e-07.