Let's divide 776801 by 90
The aim is to understand the frequency of 90 in 776801.

On to step 1:
When dividing 7 by 90, we get 0 with 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 (7) from the dividend, add it to 7, then carry on: 77 / 90

Moving on 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
Subtract 0 from 77 to get 77.
Append the next digit (6) from the dividend to 77 and continue with: 776 / 90

Going ahead to step 3:
When dividing 776 by 90, we get 8 with a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 720 away from 776, we end up with 56.
Include the next digit (8) from the dividend after 56, then repeat: 568 / 90

Advancing to step 4:
If we divide 568 by 90, we get 6 and a remainder of 28.
The next digit of our result is 6. 
Result so far: 86.0
The remainder is 28 after subtracting 540 from 568.
Include the next digit (0) from the dividend after 28, then repeat: 280 / 90

Going ahead to step 5:
90 goes into 280 3 times with a remainder of 10.
The next digit of our result is 3. 
Result so far: 863.0
Subtracting 270 from 280 leaves us with 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 90

Let's proceed to step 6:
The number 90 fits into 101 1 times, leaving a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 8631.0
Subtract 90 from 101 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
90 goes into 110 1 times with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 8631.1
If we take 90 away from 110, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
90 can be fit into 200 2 times, resulting in a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 8631.12
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
90 goes into 200 2 times with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 8631.122
Deduct 180 from 200 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 8631.122 with a remainder of 0.002.