Let's divide 91541781 by 255
The aim is to understand the frequency of 255 in 91541781.

On to step 1:
255 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 255

Let's proceed to step 2:
91 divided by 255 is 0 with a remainder of 91.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Take the next digit (5) from the dividend and append it to 91, then repeat: 915 / 255

Advancing to step 3:
255 goes into 915 3 times with a remainder of 150.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 765 from 915 to get 150.
Bring next digit (4) of the dividend behind the 150 and repeat the process: 1504 / 255

Let's proceed to step 4:
When dividing 1504 by 255, we get 5 with a remainder of 229.
Put 5 as the next digit of the answer. 
Result so far: 35.0
Subtracting 1275 from 1504 leaves us with 229.
Fetch the next digit (1) from the dividend, attach it to 229 and continue: 2291 / 255

On to step 5:
If we divide 2291 by 255, we get 8 and a remainder of 251.
Record the quotient 8 as the next digit in the result. 
Result so far: 358.0
The remainder is 251 after subtracting 2040 from 2291.
Append the next digit (7) from the dividend to 251 and continue with: 2517 / 255

Step 6:
When dividing 2517 by 255, we get 9 with a remainder of 222.
Write down 9 as next digit of the result. 
Result so far: 3589.0
If we take 2295 away from 2517, we end up with 222.
Append the next digit (8) from the dividend to 222 and continue with: 2228 / 255

Step 7:
255 goes into 2228 8 times with a remainder of 188.
Put 8 as the next digit of the answer. 
Result so far: 35898.0
If we take 2040 away from 2228, we end up with 188.
Take the next digit (1) from the dividend and append it to 188, then repeat: 1881 / 255

Step 8:
1881 divided by 255 is 7 with a remainder of 96.
The number 7 becomes the next digit in our result. 
Result so far: 358987.0
Subtracting 1785 from 1881 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 9:
960 divided by 255 is 3 with a remainder of 195.
Write down 3 as next digit of the result. 
Result so far: 358987.3
The remainder is 195 after subtracting 765 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Moving on to step 10:
255 can be fit into 1950 7 times, resulting in a remainder of 165.
Write down 7 as next digit of the result. 
Result so far: 358987.37
If we take 1785 away from 1950, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 11:
When dividing 1650 by 255, we get 6 with a remainder of 120.
Put 6 as the next digit of the answer. 
Result so far: 358987.376
Deduct 1530 from 1650 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 12:
The number 255 fits into 1200 4 times, leaving a remainder of 180.
Record the quotient 4 as the next digit in the result. 
Result so far: 358987.3764
Subtract 1020 from 1200 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 13:
255 can be fit into 1800 7 times, resulting in a remainder of 15.
The next digit of our result is 7. 
Result so far: 358987.37647
If we subtract 1785 from 1800, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 14:
255 goes into 150 0 times with a remainder of 150.
The next digit of our result is 0. 
Result so far: 358987.37647
Subtracting 0 from 150 leaves us with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 15:
When dividing 1500 by 255, we get 5 with a remainder of 225.
Put 5 as the next digit of the answer. 
Result so far: 358987.3764705
The remainder is 225 after subtracting 1275 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Advancing to step 16:
When dividing 2250 by 255, we get 8 with a remainder of 210.
Record the quotient 8 as the next digit in the result. 
Result so far: 358987.37647058
If we take 2040 away from 2250, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

After the division, we end up with 358987.37647058 and a remainder of 2.1e-07.