58651 ÷ 90 
The aim is to understand the frequency of 90 in 58651.

Step 1:
When dividing 5 by 90, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 90

Moving on to step 2:
The number 90 fits into 58 0 times, leaving a remainder of 58.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 58 to get 58.
Include the next digit (6) from the dividend after 58, then repeat: 586 / 90

Step 3:
The number 90 fits into 586 6 times, leaving a remainder of 46.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 540 away from 586, we end up with 46.
Fetch the next digit (5) from the dividend, attach it to 46 and continue: 465 / 90

Going ahead to step 4:
When dividing 465 by 90, we get 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 65.0
The remainder is 15 after subtracting 450 from 465.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 90

Advancing to step 5:
If we divide 151 by 90, we get 1 and a remainder of 61.
Record the quotient 1 as the next digit in the result. 
Result so far: 651.0
If we take 90 away from 151, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 6:
90 can be fit into 610 6 times, resulting in a remainder of 70.
Write down 6 as next digit of the result. 
Result so far: 651.6
Subtract 540 from 610 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.

On to step 7:
When dividing 700 by 90, we get 7 with a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 651.67
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.

Going ahead to step 8:
90 can be fit into 700 7 times, resulting in a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 651.677
If we subtract 630 from 700, 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.

After the division, we end up with 651.677 and a remainder of 0.007.