We divide 580934 by 90
The aim is to understand the frequency of 90 in 580934.

Let's proceed to step 1:
If we divide 5 by 90, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 90

Moving on to step 2:
The number 90 fits into 58 0 times, leaving a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 58 after subtracting 0 from 58.
Fetch the next digit (0) from the dividend, attach it to 58 and continue: 580 / 90

Let's proceed to step 3:
90 goes into 580 6 times with a remainder of 40.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 540 from 580 to get 40.
Include the next digit (9) from the dividend after 40, then repeat: 409 / 90

Let's proceed to step 4:
When dividing 409 by 90, we get 4 with a remainder of 49.
Write down 4 as next digit of the result. 
Result so far: 64.0
The remainder is 49 after subtracting 360 from 409.
Grab the next digit (3) from the dividend, add it to 49, then carry on: 493 / 90

Advancing to step 5:
90 goes into 493 5 times with a remainder of 43.
Put 5 as the next digit of the answer. 
Result so far: 645.0
Deduct 450 from 493 and we're left with 43.
Append the next digit (4) from the dividend to 43 and continue with: 434 / 90

Going ahead to step 6:
434 divided by 90 is 4 with a remainder of 74.
Write down 4 as next digit of the result. 
Result so far: 6454.0
Deduct 360 from 434 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 7:
When dividing 740 by 90, we get 8 with a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 6454.8
Deduct 720 from 740 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.

On to step 8:
200 divided by 90 is 2 with a remainder of 20.
The next digit of our result is 2. 
Result so far: 6454.82
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.

Step 9:
90 can be fit into 200 2 times, resulting in a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 6454.822
If we subtract 180 from 200, we 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.

After the division, we end up with 6454.822 and a remainder of 0.002.