We divide 90638376 by 30
The aim is to understand the frequency of 30 in 90638376.

Step 1:
When dividing 9 by 30, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 30

Advancing to step 2:
30 can be fit into 90 3 times, resulting in a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 90 from 90 leaves us with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 30

Going ahead to step 3:
6 divided by 30 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 30.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 30

Step 4:
30 goes into 63 2 times with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 302.0
The remainder is 3 after subtracting 60 from 63.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 30

Let's proceed to step 5:
When dividing 38 by 30, we get 1 with a remainder of 8.
The next digit of our result is 1. 
Result so far: 3021.0
If we subtract 30 from 38, we get 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 30

Advancing to step 6:
30 goes into 83 2 times with a remainder of 23.
The number 2 becomes the next digit in our result. 
Result so far: 30212.0
Subtracting 60 from 83 leaves us with 23.
Append the next digit (7) from the dividend to 23 and continue with: 237 / 30

Going ahead to step 7:
The number 30 fits into 237 7 times, leaving a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 302127.0
If we subtract 210 from 237, we get 27.
Grab the next digit (6) from the dividend, add it to 27, then carry on: 276 / 30

Advancing to step 8:
If we divide 276 by 30, we get 9 and a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 3021279.0
Subtract 270 from 276 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
30 can be fit into 60 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 3021279.2
Subtract 60 from 60 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
If we divide 0 by 30, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3021279.2
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
30 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 3021279.2
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 3021279.2 and a remainder of 0.0.