425066 ÷ 90 
The aim is to understand the frequency of 90 in 425066.

On to step 1:
If we divide 4 by 90, we get 0 and 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.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 90

Moving on to step 2:
90 can be fit into 42 0 times, resulting in a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Include the next digit (5) from the dividend after 42, then repeat: 425 / 90

Advancing to step 3:
425 divided by 90 is 4 with a remainder of 65.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 360 from 425 to get 65.
Append the next digit (0) from the dividend to 65 and continue with: 650 / 90

Going ahead to step 4:
The number 90 fits into 650 7 times, leaving a remainder of 20.
Write down 7 as next digit of the result. 
Result so far: 47.0
Subtracting 630 from 650 leaves us with 20.
Fetch the next digit (6) from the dividend, attach it to 20 and continue: 206 / 90

On to step 5:
206 divided by 90 is 2 with a remainder of 26.
The next digit of our result is 2. 
Result so far: 472.0
The remainder is 26 after subtracting 180 from 206.
Grab the next digit (6) from the dividend, add it to 26, then carry on: 266 / 90

Let's proceed to step 6:
266 divided by 90 is 2 with a remainder of 86.
Record the quotient 2 as the next digit in the result. 
Result so far: 4722.0
Deduct 180 from 266 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Advancing to step 7:
90 goes into 860 9 times with a remainder of 50.
Put 9 as the next digit of the answer. 
Result so far: 4722.9
If we subtract 810 from 860, 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.

Let's proceed to step 8:
500 divided by 90 is 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 4722.95
If we take 450 away from 500, we end up 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 9:
If we divide 500 by 90, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 4722.955
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.

The quotient of the division is 4722.955, and the remainder is 0.005.