We look at the division of 636787 by 30 
The aim is to understand the frequency of 30 in 636787.

Step 1:
30 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 30

Advancing to step 2:
When dividing 63 by 30, we get 2 with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 60 away from 63, we end up with 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 30

Step 3:
36 divided by 30 is 1 with a remainder of 6.
The next digit of our result is 1. 
Result so far: 21.0
If we subtract 30 from 36, we get 6.
Grab the next digit (7) from the dividend, add it to 6, then carry on: 67 / 30

Moving on to step 4:
30 goes into 67 2 times with a remainder of 7.
The next digit of our result is 2. 
Result so far: 212.0
Subtract 60 from 67 to get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 30

On to step 5:
The number 30 fits into 78 2 times, leaving a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 2122.0
Subtracting 60 from 78 leaves us with 18.
Fetch the next digit (7) from the dividend, attach it to 18 and continue: 187 / 30

Step 6:
The number 30 fits into 187 6 times, leaving a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 21226.0
Subtracting 180 from 187 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:
The number 30 fits into 70 2 times, leaving a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 21226.2
The remainder is 10 after subtracting 60 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
If we divide 100 by 30, we get 3 and a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 21226.23
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
30 goes into 100 3 times with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 21226.233
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 21226.233 and a remainder of 0.001.