We're dividing 769217 by 90 
The aim is to understand the frequency of 90 in 769217.

Step 1:
The number 90 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 90

Let's proceed to step 2:
The number 90 fits into 76 0 times, leaving a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 76, we get 76.
Take the next digit (9) from the dividend and append it to 76, then repeat: 769 / 90

On to step 3:
90 goes into 769 8 times with a remainder of 49.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 720 from 769 leaves us with 49.
Grab the next digit (2) from the dividend, add it to 49, then carry on: 492 / 90

Let's proceed to step 4:
492 divided by 90 is 5 with a remainder of 42.
Write down 5 as next digit of the result. 
Result so far: 85.0
Deduct 450 from 492 and we're left with 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 90

On to step 5:
The number 90 fits into 421 4 times, leaving a remainder of 61.
The next digit of our result is 4. 
Result so far: 854.0
If we take 360 away from 421, we end up with 61.
Bring next digit (7) of the dividend behind the 61 and repeat the process: 617 / 90

Going ahead to step 6:
When dividing 617 by 90, we get 6 with a remainder of 77.
Put 6 as the next digit of the answer. 
Result so far: 8546.0
Subtract 540 from 617 to get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 7:
770 divided by 90 is 8 with a remainder of 50.
The number 8 becomes the next digit in our result. 
Result so far: 8546.8
Deduct 720 from 770 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.

Going ahead to step 8:
500 divided by 90 is 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 8546.85
If we subtract 450 from 500, we get 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 9:
90 can be fit into 500 5 times, resulting in a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 8546.855
Subtracting 450 from 500 leaves us 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.

The final result is 8546.855 with a remainder of 0.005.