We look at the division of 256103 by 90 
The aim is to understand the frequency of 90 in 256103.

Moving on to step 1:
When dividing 2 by 90, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 90

On to step 2:
90 can be fit into 25 0 times, resulting in a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Fetch the next digit (6) from the dividend, attach it to 25 and continue: 256 / 90

Going ahead to step 3:
90 goes into 256 2 times with a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 180 from 256 to get 76.
Grab the next digit (1) from the dividend, add it to 76, then carry on: 761 / 90

Let's proceed to step 4:
When dividing 761 by 90, we get 8 with a remainder of 41.
The next digit of our result is 8. 
Result so far: 28.0
If we take 720 away from 761, we end up with 41.
Bring next digit (0) of the dividend behind the 41 and repeat the process: 410 / 90

Moving on to step 5:
When dividing 410 by 90, we get 4 with a remainder of 50.
Record the quotient 4 as the next digit in the result. 
Result so far: 284.0
Deduct 360 from 410 and we're left with 50.
Include the next digit (3) from the dividend after 50, then repeat: 503 / 90

Moving on to step 6:
503 divided by 90 is 5 with a remainder of 53.
Write down 5 as next digit of the result. 
Result so far: 2845.0
If we take 450 away from 503, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 7:
If we divide 530 by 90, we get 5 and a remainder of 80.
The number 5 becomes the next digit in our result. 
Result so far: 2845.5
If we take 450 away from 530, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 8:
The number 90 fits into 800 8 times, leaving a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 2845.58
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.

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: 2845.588
Subtracting 720 from 800 leaves us with 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 outcome is 2845.588, with a leftover of 0.008.