We're dividing 74178659 by 90 
The aim is to understand the frequency of 90 in 74178659.

Let's proceed to step 1:
When dividing 7 by 90, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 90

Advancing to step 2:
When dividing 74 by 90, we get 0 with a remainder of 74.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 74 leaves us with 74.
Grab the next digit (1) from the dividend, add it to 74, then carry on: 741 / 90

Moving on to step 3:
90 can be fit into 741 8 times, resulting in a remainder of 21.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 21 after subtracting 720 from 741.
Append the next digit (7) from the dividend to 21 and continue with: 217 / 90

Step 4:
217 divided by 90 is 2 with a remainder of 37.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
Subtract 180 from 217 to get 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 90

Let's proceed to step 5:
The number 90 fits into 378 4 times, leaving a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 824.0
If we subtract 360 from 378, we get 18.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 90

Going ahead to step 6:
When dividing 186 by 90, we get 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 8242.0
If we take 180 away from 186, we end up with 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 90

Going ahead to step 7:
90 goes into 65 0 times with a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 82420.0
Subtracting 0 from 65 leaves us with 65.
Include the next digit (9) from the dividend after 65, then repeat: 659 / 90

Step 8:
90 goes into 659 7 times with a remainder of 29.
The number 7 becomes the next digit in our result. 
Result so far: 824207.0
Deduct 630 from 659 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 9:
When dividing 290 by 90, we get 3 with a remainder of 20.
The next digit of our result is 3. 
Result so far: 824207.3
Subtract 270 from 290 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
90 can be fit into 200 2 times, resulting in a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 824207.32
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
When dividing 200 by 90, we get 2 with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 824207.322
Subtracting 180 from 200 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.

Our division results in 824207.322 with a remaining 0.002.