We divide 650059 by 90
The aim is to understand the frequency of 90 in 650059.

Advancing to step 1:
When dividing 6 by 90, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 90

On to step 2:
When dividing 65 by 90, we get 0 with a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 65 after subtracting 0 from 65.
Append the next digit (0) from the dividend to 65 and continue with: 650 / 90

Moving on to step 3:
90 can be fit into 650 7 times, resulting in a remainder of 20.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 630 from 650 to get 20.
Fetch the next digit (0) from the dividend, attach it to 20 and continue: 200 / 90

Let's proceed to step 4:
90 goes into 200 2 times with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 72.0
Subtract 180 from 200 to get 20.
Fetch the next digit (5) from the dividend, attach it to 20 and continue: 205 / 90

Advancing to step 5:
205 divided by 90 is 2 with a remainder of 25.
Use 2 as the next digit of our solution. 
Result so far: 722.0
Subtracting 180 from 205 leaves us with 25.
Grab the next digit (9) from the dividend, add it to 25, then carry on: 259 / 90

On to step 6:
When dividing 259 by 90, we get 2 with a remainder of 79.
Record the quotient 2 as the next digit in the result. 
Result so far: 7222.0
Subtracting 180 from 259 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 7:
The number 90 fits into 790 8 times, leaving a remainder of 70.
The next digit of our result is 8. 
Result so far: 7222.8
If we subtract 720 from 790, 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.

Going ahead to step 8:
If we divide 700 by 90, we get 7 and a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 7222.87
If we take 630 away from 700, we end up 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.

Step 9:
If we divide 700 by 90, we get 7 and a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 7222.877
Deduct 630 from 700 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.

The final result is 7222.877 with a remainder of 0.007.