We're dividing 202156 by 90 
The aim is to understand the frequency of 90 in 202156.

Advancing to 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
Deduct 0 from 2 and we're left with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 90

Let's proceed to step 2:
90 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Include the next digit (2) from the dividend after 20, then repeat: 202 / 90

Moving on to step 3:
90 can be fit into 202 2 times, resulting in a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 22 after subtracting 180 from 202.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 90

Going ahead to step 4:
221 divided by 90 is 2 with a remainder of 41.
Use 2 as the next digit of our solution. 
Result so far: 22.0
Subtract 180 from 221 to get 41.
Fetch the next digit (5) from the dividend, attach it to 41 and continue: 415 / 90

On to step 5:
415 divided by 90 is 4 with a remainder of 55.
Record the quotient 4 as the next digit in the result. 
Result so far: 224.0
Subtract 360 from 415 to get 55.
Grab the next digit (6) from the dividend, add it to 55, then carry on: 556 / 90

On to step 6:
90 goes into 556 6 times with a remainder of 16.
The next digit of our result is 6. 
Result so far: 2246.0
If we take 540 away from 556, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
If we divide 160 by 90, we get 1 and a remainder of 70.
The next digit of our result is 1. 
Result so far: 2246.1
Subtract 90 from 160 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 8:
If we divide 700 by 90, we get 7 and a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 2246.17
If we take 630 away from 700, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 9:
90 goes into 700 7 times with a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 2246.177
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

After the division, we end up with 2246.177 and a remainder of 0.007.