We're dividing 137158 by 90 
The aim is to understand the frequency of 90 in 137158.

Moving on to step 1:
If we divide 1 by 90, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 90

Going ahead 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
The remainder is 13 after subtracting 0 from 13.
Bring next digit (7) of the dividend behind the 13 and repeat the process: 137 / 90

Advancing to step 3:
90 can be fit into 137 1 times, resulting in a remainder of 47.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 47 after subtracting 90 from 137.
Grab the next digit (1) from the dividend, add it to 47, then carry on: 471 / 90

Let's proceed to step 4:
90 can be fit into 471 5 times, resulting in a remainder of 21.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 21 after subtracting 450 from 471.
Fetch the next digit (5) from the dividend, attach it to 21 and continue: 215 / 90

Let's proceed to step 5:
When dividing 215 by 90, we get 2 with a remainder of 35.
The number 2 becomes the next digit in our result. 
Result so far: 152.0
If we take 180 away from 215, we end up with 35.
Include the next digit (8) from the dividend after 35, then repeat: 358 / 90

Advancing to step 6:
90 can be fit into 358 3 times, resulting in a remainder of 88.
Use 3 as the next digit of our solution. 
Result so far: 1523.0
Subtract 270 from 358 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 7:
When dividing 880 by 90, we get 9 with a remainder of 70.
Record the quotient 9 as the next digit in the result. 
Result so far: 1523.9
Subtracting 810 from 880 leaves us 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.

Moving on to step 8:
The number 90 fits into 700 7 times, leaving a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 1523.97
Subtracting 630 from 700 leaves us 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.

Moving on to step 9:
When dividing 700 by 90, we get 7 with a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 1523.977
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.

Our division results in 1523.977 with a remaining 0.007.