201143 divided by 90 
The aim is to understand the frequency of 90 in 201143.

Advancing to step 1:
2 divided by 90 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 90

On to step 2:
20 divided by 90 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 90

Let's proceed to step 3:
90 can be fit into 201 2 times, resulting in a remainder of 21.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 180 from 201 and we're left with 21.
Fetch the next digit (1) from the dividend, attach it to 21 and continue: 211 / 90

Moving on to step 4:
If we divide 211 by 90, we get 2 and a remainder of 31.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
Deduct 180 from 211 and we're left with 31.
Bring next digit (4) of the dividend behind the 31 and repeat the process: 314 / 90

On to step 5:
90 goes into 314 3 times with a remainder of 44.
Record the quotient 3 as the next digit in the result. 
Result so far: 223.0
The remainder is 44 after subtracting 270 from 314.
Fetch the next digit (3) from the dividend, attach it to 44 and continue: 443 / 90

Step 6:
90 can be fit into 443 4 times, resulting in a remainder of 83.
Put 4 as the next digit of the answer. 
Result so far: 2234.0
Subtract 360 from 443 to get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 7:
830 divided by 90 is 9 with a remainder of 20.
Record the quotient 9 as the next digit in the result. 
Result so far: 2234.9
Subtracting 810 from 830 leaves us with 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 8:
The number 90 fits into 200 2 times, leaving a remainder of 20.
The next digit of our result is 2. 
Result so far: 2234.92
Subtract 180 from 200 to 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.

On to step 9:
If we divide 200 by 90, we get 2 and a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 2234.922
Subtract 180 from 200 to 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.

The final outcome is 2234.922, with a leftover of 0.002.