186716 ÷ 90 
The aim is to understand the frequency of 90 in 186716.

Let's proceed to step 1:
1 divided by 90 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 90

Moving on to step 2:
The number 90 fits into 18 0 times, leaving a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 18 after subtracting 0 from 18.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 90

Advancing to step 3:
90 can be fit into 186 2 times, resulting in a remainder of 6.
The next digit of our result is 2. 
Result so far: 2.0
If we take 180 away from 186, we end up with 6.
Grab the next digit (7) from the dividend, add it to 6, then carry on: 67 / 90

Step 4:
When dividing 67 by 90, we get 0 with a remainder of 67.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Subtracting 0 from 67 leaves us with 67.
Take the next digit (1) from the dividend and append it to 67, then repeat: 671 / 90

Going ahead to step 5:
If we divide 671 by 90, we get 7 and a remainder of 41.
The next digit of our result is 7. 
Result so far: 207.0
If we take 630 away from 671, we end up with 41.
Fetch the next digit (6) from the dividend, attach it to 41 and continue: 416 / 90

Advancing to step 6:
90 can be fit into 416 4 times, resulting in a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 2074.0
If we take 360 away from 416, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 7:
90 can be fit into 560 6 times, resulting in a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 2074.6
Subtracting 540 from 560 leaves us 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.

Let's proceed to step 8:
If we divide 200 by 90, we get 2 and a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 2074.62
If we take 180 away from 200, we end up 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.

Advancing to step 9:
When dividing 200 by 90, we get 2 with a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 2074.622
The remainder is 20 after subtracting 180 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 2074.622 with a remainder of 0.002.