497149 divided by 90 
The aim is to understand the frequency of 90 in 497149.

Moving on to step 1:
90 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 90

On to step 2:
90 goes into 49 0 times with a remainder of 49.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 49, we end up with 49.
Bring next digit (7) of the dividend behind the 49 and repeat the process: 497 / 90

Let's proceed to step 3:
90 goes into 497 5 times with a remainder of 47.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 450 from 497 and we're left with 47.
Take the next digit (1) from the dividend and append it to 47, then repeat: 471 / 90

Moving on to step 4:
The number 90 fits into 471 5 times, leaving a remainder of 21.
Write down 5 as next digit of the result. 
Result so far: 55.0
The remainder is 21 after subtracting 450 from 471.
Bring next digit (4) of the dividend behind the 21 and repeat the process: 214 / 90

Step 5:
The number 90 fits into 214 2 times, leaving a remainder of 34.
Use 2 as the next digit of our solution. 
Result so far: 552.0
Subtract 180 from 214 to get 34.
Include the next digit (9) from the dividend after 34, then repeat: 349 / 90

Advancing to step 6:
When dividing 349 by 90, we get 3 with a remainder of 79.
Write down 3 as next digit of the result. 
Result so far: 5523.0
If we subtract 270 from 349, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 7:
790 divided by 90 is 8 with a remainder of 70.
Record the quotient 8 as the next digit in the result. 
Result so far: 5523.8
Subtract 720 from 790 to 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.

Advancing to step 8:
700 divided by 90 is 7 with a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 5523.87
The remainder is 70 after subtracting 630 from 700.
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 9:
90 can be fit into 700 7 times, resulting in a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 5523.877
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.

The final outcome is 5523.877, with a leftover of 0.007.