275147 divided by 90 
The aim is to understand the frequency of 90 in 275147.

Step 1:
2 divided by 90 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (7) from the dividend to 2 and continue with: 27 / 90

Step 2:
The number 90 fits into 27 0 times, leaving a remainder of 27.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 27, we end up with 27.
Take the next digit (5) from the dividend and append it to 27, then repeat: 275 / 90

Advancing to step 3:
The number 90 fits into 275 3 times, leaving a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 270 away from 275, we end up with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 90

Let's proceed to step 4:
90 can be fit into 51 0 times, resulting in a remainder of 51.
The next digit of our result is 0. 
Result so far: 30.0
Deduct 0 from 51 and we're left with 51.
Append the next digit (4) from the dividend to 51 and continue with: 514 / 90

Moving on to step 5:
If we divide 514 by 90, we get 5 and a remainder of 64.
Use 5 as the next digit of our solution. 
Result so far: 305.0
If we subtract 450 from 514, we get 64.
Fetch the next digit (7) from the dividend, attach it to 64 and continue: 647 / 90

Going ahead to step 6:
90 goes into 647 7 times with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 3057.0
Deduct 630 from 647 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
90 can be fit into 170 1 times, resulting in a remainder of 80.
Record the quotient 1 as the next digit in the result. 
Result so far: 3057.1
If we subtract 90 from 170, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 8:
800 divided by 90 is 8 with a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 3057.18
The remainder is 80 after subtracting 720 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 9:
If we divide 800 by 90, we get 8 and a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 3057.188
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final result is 3057.188 with a remainder of 0.008.