73610250 ÷ 90 
The aim is to understand the frequency of 90 in 73610250.

Let's proceed to step 1:
When dividing 7 by 90, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 90

Let's proceed to step 2:
When dividing 73 by 90, we get 0 with a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 73 to get 73.
Grab the next digit (6) from the dividend, add it to 73, then carry on: 736 / 90

On to step 3:
736 divided by 90 is 8 with a remainder of 16.
The next digit of our result is 8. 
Result so far: 8.0
If we take 720 away from 736, we end up with 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 90

Step 4:
If we divide 161 by 90, we get 1 and a remainder of 71.
Use 1 as the next digit of our solution. 
Result so far: 81.0
Deduct 90 from 161 and we're left with 71.
Include the next digit (0) from the dividend after 71, then repeat: 710 / 90

Going ahead to step 5:
If we divide 710 by 90, we get 7 and a remainder of 80.
The number 7 becomes the next digit in our result. 
Result so far: 817.0
If we subtract 630 from 710, we get 80.
Grab the next digit (2) from the dividend, add it to 80, then carry on: 802 / 90

Let's proceed to step 6:
When dividing 802 by 90, we get 8 with a remainder of 82.
Record the quotient 8 as the next digit in the result. 
Result so far: 8178.0
Subtract 720 from 802 to get 82.
Fetch the next digit (5) from the dividend, attach it to 82 and continue: 825 / 90

Step 7:
If we divide 825 by 90, we get 9 and a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 81789.0
Subtracting 810 from 825 leaves us with 15.
Include the next digit (0) from the dividend after 15, then repeat: 150 / 90

On to step 8:
If we divide 150 by 90, we get 1 and a remainder of 60.
Write down 1 as next digit of the result. 
Result so far: 817891.0
Deduct 90 from 150 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
When dividing 600 by 90, we get 6 with a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 817891.6
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 10:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The next digit of our result is 6. 
Result so far: 817891.66
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

In conclusion, the division gives 817891.66 with a balance of 0.06.