56619 ÷ 90 
The aim is to understand the frequency of 90 in 56619.

Moving on to step 1:
If we divide 5 by 90, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (6) from the dividend and append it to 5, then repeat: 56 / 90

On to step 2:
The number 90 fits into 56 0 times, leaving a remainder of 56.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 56, we get 56.
Grab the next digit (6) from the dividend, add it to 56, then carry on: 566 / 90

Let's proceed to step 3:
90 goes into 566 6 times with a remainder of 26.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 540 from 566 to get 26.
Fetch the next digit (1) from the dividend, attach it to 26 and continue: 261 / 90

Step 4:
90 goes into 261 2 times with a remainder of 81.
Record the quotient 2 as the next digit in the result. 
Result so far: 62.0
Subtracting 180 from 261 leaves us with 81.
Fetch the next digit (9) from the dividend, attach it to 81 and continue: 819 / 90

Going ahead to step 5:
The number 90 fits into 819 9 times, leaving a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 629.0
Subtracting 810 from 819 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 6:
90 goes into 90 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 629.1
Deduct 90 from 90 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 7:
0 divided by 90 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 629.1
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
When dividing 0 by 90, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 629.1
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 629.1 with a remainder of 0.0.