69490245 divided by 90 
The aim is to understand the frequency of 90 in 69490245.

Going ahead to step 1:
90 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 90

Going ahead to step 2:
The number 90 fits into 69 0 times, leaving a remainder of 69.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 69 and we're left with 69.
Fetch the next digit (4) from the dividend, attach it to 69 and continue: 694 / 90

Advancing to step 3:
The number 90 fits into 694 7 times, leaving a remainder of 64.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 630 from 694 leaves us with 64.
Fetch the next digit (9) from the dividend, attach it to 64 and continue: 649 / 90

Step 4:
The number 90 fits into 649 7 times, leaving a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 77.0
The remainder is 19 after subtracting 630 from 649.
Grab the next digit (0) from the dividend, add it to 19, then carry on: 190 / 90

On to step 5:
90 can be fit into 190 2 times, resulting in a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 772.0
If we subtract 180 from 190, we get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 90

Going ahead to step 6:
90 can be fit into 102 1 times, resulting in a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 7721.0
Deduct 90 from 102 and we're left with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 90

Step 7:
The number 90 fits into 124 1 times, leaving a remainder of 34.
The next digit of our result is 1. 
Result so far: 77211.0
If we subtract 90 from 124, we get 34.
Fetch the next digit (5) from the dividend, attach it to 34 and continue: 345 / 90

Going ahead to step 8:
90 can be fit into 345 3 times, resulting in a remainder of 75.
Put 3 as the next digit of the answer. 
Result so far: 772113.0
If we subtract 270 from 345, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 9:
When dividing 750 by 90, we get 8 with a remainder of 30.
Record the quotient 8 as the next digit in the result. 
Result so far: 772113.8
If we subtract 720 from 750, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 10:
When dividing 300 by 90, we get 3 with a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 772113.83
Deduct 270 from 300 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.

Step 11:
When dividing 300 by 90, we get 3 with a remainder of 30.
The next digit of our result is 3. 
Result so far: 772113.833
If we subtract 270 from 300, we get 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 result is 772113.833 with a remainder of 0.003.