We're dividing 257545 by 90 
The aim is to understand the frequency of 90 in 257545.

Advancing to step 1:
90 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 90

Moving on to step 2:
90 goes into 25 0 times with a remainder of 25.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Fetch the next digit (7) from the dividend, attach it to 25 and continue: 257 / 90

Let's proceed to step 3:
90 goes into 257 2 times with a remainder of 77.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 180 from 257 leaves us with 77.
Grab the next digit (5) from the dividend, add it to 77, then carry on: 775 / 90

On to step 4:
90 can be fit into 775 8 times, resulting in a remainder of 55.
Write down 8 as next digit of the result. 
Result so far: 28.0
Subtracting 720 from 775 leaves us with 55.
Take the next digit (4) from the dividend and append it to 55, then repeat: 554 / 90

On to step 5:
90 can be fit into 554 6 times, resulting in a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 286.0
Subtract 540 from 554 to get 14.
Fetch the next digit (5) from the dividend, attach it to 14 and continue: 145 / 90

Let's proceed to step 6:
When dividing 145 by 90, we get 1 with a remainder of 55.
Write down 1 as next digit of the result. 
Result so far: 2861.0
The remainder is 55 after subtracting 90 from 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 7:
The number 90 fits into 550 6 times, leaving a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 2861.6
If we take 540 away from 550, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 90 is 1 with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 2861.61
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
If we divide 100 by 90, we get 1 and a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 2861.611
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 2861.611 with a remainder of 0.001.