238386 ÷ 90 
The aim is to understand the frequency of 90 in 238386.

Let's proceed to step 1:
When dividing 2 by 90, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 90

Let's proceed to step 2:
90 can be fit into 23 0 times, resulting in a remainder of 23.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 23 leaves us with 23.
Bring next digit (8) of the dividend behind the 23 and repeat the process: 238 / 90

Going ahead to step 3:
90 can be fit into 238 2 times, resulting in a remainder of 58.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 180 from 238 and we're left with 58.
Bring next digit (3) of the dividend behind the 58 and repeat the process: 583 / 90

Moving on to step 4:
When dividing 583 by 90, we get 6 with a remainder of 43.
Write down 6 as next digit of the result. 
Result so far: 26.0
If we take 540 away from 583, we end up with 43.
Take the next digit (8) from the dividend and append it to 43, then repeat: 438 / 90

Step 5:
90 goes into 438 4 times with a remainder of 78.
Put 4 as the next digit of the answer. 
Result so far: 264.0
The remainder is 78 after subtracting 360 from 438.
Fetch the next digit (6) from the dividend, attach it to 78 and continue: 786 / 90

On to step 6:
90 goes into 786 8 times with a remainder of 66.
Record the quotient 8 as the next digit in the result. 
Result so far: 2648.0
Subtract 720 from 786 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 7:
When dividing 660 by 90, we get 7 with a remainder of 30.
Write down 7 as next digit of the result. 
Result so far: 2648.7
Deduct 630 from 660 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 2648.73
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 2648.733
Subtract 270 from 300 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 2648.733, with a leftover of 0.003.