404695 ÷ 90 
The aim is to understand the frequency of 90 in 404695.

Moving on to step 1:
The number 90 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 90

Moving on to step 2:
When dividing 40 by 90, we get 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Include the next digit (4) from the dividend after 40, then repeat: 404 / 90

Step 3:
The number 90 fits into 404 4 times, leaving a remainder of 44.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 360 from 404 leaves us with 44.
Grab the next digit (6) from the dividend, add it to 44, then carry on: 446 / 90

Advancing to step 4:
90 can be fit into 446 4 times, resulting in a remainder of 86.
The next digit of our result is 4. 
Result so far: 44.0
Subtracting 360 from 446 leaves us with 86.
Append the next digit (9) from the dividend to 86 and continue with: 869 / 90

Going ahead to step 5:
If we divide 869 by 90, we get 9 and a remainder of 59.
Use 9 as the next digit of our solution. 
Result so far: 449.0
The remainder is 59 after subtracting 810 from 869.
Fetch the next digit (5) from the dividend, attach it to 59 and continue: 595 / 90

Going ahead to step 6:
595 divided by 90 is 6 with a remainder of 55.
Put 6 as the next digit of the answer. 
Result so far: 4496.0
Subtracting 540 from 595 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 7:
When dividing 550 by 90, we get 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 4496.6
Deduct 540 from 550 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
If we divide 100 by 90, we get 1 and a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 4496.61
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
90 goes into 100 1 times with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 4496.611
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 4496.611 with a remainder of 0.001.