661337 divided by 30 
The aim is to understand the frequency of 30 in 661337.

Going ahead to step 1:
The number 30 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 30

Moving on to step 2:
66 divided by 30 is 2 with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 60 from 66 leaves us with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 30

On to step 3:
When dividing 61 by 30, we get 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 22.0
If we subtract 60 from 61, we get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 30

Going ahead to step 4:
13 divided by 30 is 0 with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 220.0
Subtract 0 from 13 to get 13.
Fetch the next digit (3) from the dividend, attach it to 13 and continue: 133 / 30

Step 5:
30 can be fit into 133 4 times, resulting in a remainder of 13.
The next digit of our result is 4. 
Result so far: 2204.0
If we subtract 120 from 133, we get 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 30

On to step 6:
When dividing 137 by 30, we get 4 with a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 22044.0
Subtracting 120 from 137 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
30 can be fit into 170 5 times, resulting in a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 22044.5
Deduct 150 from 170 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 8:
When dividing 200 by 30, we get 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 22044.56
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.

On to step 9:
30 goes into 200 6 times with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 22044.566
If we take 180 away from 200, we end up 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.

After the division, we end up with 22044.566 and a remainder of 0.002.