687602 divided by 30 
The aim is to understand the frequency of 30 in 687602.

On to step 1:
If we divide 6 by 30, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 30

Let's proceed to step 2:
30 goes into 68 2 times with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 60 from 68 leaves us with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 30

Advancing to step 3:
When dividing 87 by 30, we get 2 with a remainder of 27.
Write down 2 as next digit of the result. 
Result so far: 22.0
Deduct 60 from 87 and we're left with 27.
Fetch the next digit (6) from the dividend, attach it to 27 and continue: 276 / 30

On to step 4:
When dividing 276 by 30, we get 9 with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 229.0
The remainder is 6 after subtracting 270 from 276.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 30

Going ahead to step 5:
60 divided by 30 is 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2292.0
Subtracting 60 from 60 leaves us with 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 30

Step 6:
If we divide 2 by 30, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 22920.0
The remainder is 2 after subtracting 0 from 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
If we divide 20 by 30, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 22920.0
Subtract 0 from 20 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.

Let's proceed to step 8:
200 divided by 30 is 6 with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 22920.06
Deduct 180 from 200 and we're left 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.

Going ahead to step 9:
200 divided by 30 is 6 with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 22920.066
The remainder is 20 after subtracting 180 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 22920.066 with a remainder of 0.002.