Let's divide 63545 by 90
The aim is to understand the frequency of 90 in 63545.

Step 1:
When dividing 6 by 90, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 90

Moving on to step 2:
When dividing 63 by 90, we get 0 with a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Fetch the next digit (5) from the dividend, attach it to 63 and continue: 635 / 90

Moving on to step 3:
If we divide 635 by 90, we get 7 and a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 5 after subtracting 630 from 635.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 90

Moving on to step 4:
90 can be fit into 54 0 times, resulting in a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 70.0
Subtracting 0 from 54 leaves us with 54.
Include the next digit (5) from the dividend after 54, then repeat: 545 / 90

On to step 5:
When dividing 545 by 90, we get 6 with a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 706.0
Subtract 540 from 545 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 6:
If we divide 50 by 90, we get 0 and a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 706.0
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 7:
The number 90 fits into 500 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 706.05
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 8:
90 goes into 500 5 times with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 706.055
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 706.055 with a remaining 0.005.