Let's divide 72303703 by 90
The aim is to understand the frequency of 90 in 72303703.

Step 1:
The number 90 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 90

On to step 2:
90 goes into 72 0 times with a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 72 leaves us with 72.
Append the next digit (3) from the dividend to 72 and continue with: 723 / 90

Going ahead to step 3:
90 can be fit into 723 8 times, resulting in a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 720 away from 723, we end up with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 90

Moving on to step 4:
90 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 80.0
If we subtract 0 from 30, we get 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 90

Going ahead to step 5:
If we divide 303 by 90, we get 3 and a remainder of 33.
Use 3 as the next digit of our solution. 
Result so far: 803.0
If we take 270 away from 303, we end up with 33.
Grab the next digit (7) from the dividend, add it to 33, then carry on: 337 / 90

On to step 6:
If we divide 337 by 90, we get 3 and a remainder of 67.
Write down 3 as next digit of the result. 
Result so far: 8033.0
Deduct 270 from 337 and we're left with 67.
Bring next digit (0) of the dividend behind the 67 and repeat the process: 670 / 90

On to step 7:
90 can be fit into 670 7 times, resulting in a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 80337.0
If we subtract 630 from 670, we get 40.
Take the next digit (3) from the dividend and append it to 40, then repeat: 403 / 90

Let's proceed to step 8:
If we divide 403 by 90, we get 4 and a remainder of 43.
Write down 4 as next digit of the result. 
Result so far: 803374.0
The remainder is 43 after subtracting 360 from 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 9:
90 goes into 430 4 times with a remainder of 70.
Use 4 as the next digit of our solution. 
Result so far: 803374.4
If we subtract 360 from 430, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 10:
When dividing 700 by 90, we get 7 with a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 803374.47
Subtracting 630 from 700 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 11:
90 can be fit into 700 7 times, resulting in a remainder of 70.
The next digit of our result is 7. 
Result so far: 803374.477
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 803374.477 with a balance of 0.007.