We're dividing 138337 by 90 
The aim is to understand the frequency of 90 in 138337.

Moving on to step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 90

Let's proceed to step 2:
When dividing 13 by 90, we get 0 with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 90

Advancing to step 3:
The number 90 fits into 138 1 times, leaving a remainder of 48.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 90 from 138 to get 48.
Grab the next digit (3) from the dividend, add it to 48, then carry on: 483 / 90

Moving on to step 4:
When dividing 483 by 90, we get 5 with a remainder of 33.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 33 after subtracting 450 from 483.
Include the next digit (3) from the dividend after 33, then repeat: 333 / 90

Step 5:
90 can be fit into 333 3 times, resulting in a remainder of 63.
The next digit of our result is 3. 
Result so far: 153.0
If we subtract 270 from 333, we get 63.
Grab the next digit (7) from the dividend, add it to 63, then carry on: 637 / 90

Let's proceed to step 6:
90 can be fit into 637 7 times, resulting in a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 1537.0
Subtracting 630 from 637 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
90 goes into 70 0 times with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 1537.0
Subtract 0 from 70 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 8:
The number 90 fits into 700 7 times, leaving a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 1537.07
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.

Let's proceed to step 9:
When dividing 700 by 90, we get 7 with a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 1537.077
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.

In conclusion, the division gives 1537.077 with a balance of 0.007.