Let's divide 774291 by 90
The aim is to understand the frequency of 90 in 774291.

Going ahead to step 1:
If we divide 7 by 90, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 90

Going ahead to step 2:
The number 90 fits into 77 0 times, leaving a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Append the next digit (4) from the dividend to 77 and continue with: 774 / 90

Advancing to step 3:
When dividing 774 by 90, we get 8 with a remainder of 54.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 54 after subtracting 720 from 774.
Include the next digit (2) from the dividend after 54, then repeat: 542 / 90

Advancing to step 4:
When dividing 542 by 90, we get 6 with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 86.0
If we subtract 540 from 542, we get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 90

Advancing to step 5:
90 goes into 29 0 times with a remainder of 29.
The number 0 becomes the next digit in our result. 
Result so far: 860.0
Subtract 0 from 29 to get 29.
Bring next digit (1) of the dividend behind the 29 and repeat the process: 291 / 90

Step 6:
90 goes into 291 3 times with a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 8603.0
Deduct 270 from 291 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
210 divided by 90 is 2 with a remainder of 30.
The number 2 becomes the next digit in our result. 
Result so far: 8603.2
Deduct 180 from 210 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
300 divided by 90 is 3 with a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 8603.23
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
300 divided by 90 is 3 with a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 8603.233
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 8603.233, with a leftover of 0.003.