We divide 946573 by 90
The aim is to understand the frequency of 90 in 946573.

On to step 1:
The number 90 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (4) from the dividend and append it to 9, then repeat: 94 / 90

Going ahead to step 2:
The number 90 fits into 94 1 times, leaving a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 90 away from 94, we end up with 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 90

Moving on to step 3:
46 divided by 90 is 0 with a remainder of 46.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 46 and we're left with 46.
Append the next digit (5) from the dividend to 46 and continue with: 465 / 90

Going ahead to step 4:
If we divide 465 by 90, we get 5 and a remainder of 15.
The next digit of our result is 5. 
Result so far: 105.0
If we take 450 away from 465, we end up with 15.
Take the next digit (7) from the dividend and append it to 15, then repeat: 157 / 90

Going ahead to step 5:
When dividing 157 by 90, we get 1 with a remainder of 67.
Write down 1 as next digit of the result. 
Result so far: 1051.0
The remainder is 67 after subtracting 90 from 157.
Include the next digit (3) from the dividend after 67, then repeat: 673 / 90

Advancing to step 6:
673 divided by 90 is 7 with a remainder of 43.
The next digit of our result is 7. 
Result so far: 10517.0
Subtract 630 from 673 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 7:
When dividing 430 by 90, we get 4 with a remainder of 70.
Record the quotient 4 as the next digit in the result. 
Result so far: 10517.4
Deduct 360 from 430 and we're left with 70.
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 8:
700 divided by 90 is 7 with a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 10517.47
Subtract 630 from 700 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.

Let's proceed to step 9:
90 can be fit into 700 7 times, resulting in a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 10517.477
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.

The final result is 10517.477 with a remainder of 0.007.