Let's divide 689981 by 30
The aim is to understand the frequency of 30 in 689981.

Step 1:
30 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 30

Moving on to step 2:
30 goes into 68 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 60 from 68 to get 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 30

Advancing to step 3:
89 divided by 30 is 2 with a remainder of 29.
The next digit of our result is 2. 
Result so far: 22.0
Deduct 60 from 89 and we're left with 29.
Bring next digit (9) of the dividend behind the 29 and repeat the process: 299 / 30

Let's proceed to step 4:
The number 30 fits into 299 9 times, leaving a remainder of 29.
Record the quotient 9 as the next digit in the result. 
Result so far: 229.0
Deduct 270 from 299 and we're left with 29.
Include the next digit (8) from the dividend after 29, then repeat: 298 / 30

Advancing to step 5:
298 divided by 30 is 9 with a remainder of 28.
The next digit of our result is 9. 
Result so far: 2299.0
The remainder is 28 after subtracting 270 from 298.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 30

On to step 6:
281 divided by 30 is 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 22999.0
Subtracting 270 from 281 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 7:
When dividing 110 by 30, we get 3 with a remainder of 20.
Use 3 as the next digit of our solution. 
Result so far: 22999.3
Subtracting 90 from 110 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.

Moving on to step 8:
If we divide 200 by 30, we get 6 and a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 22999.36
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.

Advancing to step 9:
200 divided by 30 is 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 22999.366
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.

Our division results in 22999.366 with a remaining 0.002.