We're dividing 30660699 by 215 
The aim is to understand the frequency of 215 in 30660699.

Advancing to step 1:
3 divided by 215 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 215

On to step 2:
215 goes into 30 0 times with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 30, we end up with 30.
Grab the next digit (6) from the dividend, add it to 30, then carry on: 306 / 215

Step 3:
215 goes into 306 1 times with a remainder of 91.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 215 from 306, we get 91.
Fetch the next digit (6) from the dividend, attach it to 91 and continue: 916 / 215

On to step 4:
215 goes into 916 4 times with a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Deduct 860 from 916 and we're left with 56.
Bring next digit (0) of the dividend behind the 56 and repeat the process: 560 / 215

On to step 5:
215 goes into 560 2 times with a remainder of 130.
Record the quotient 2 as the next digit in the result. 
Result so far: 142.0
Subtract 430 from 560 to get 130.
Append the next digit (6) from the dividend to 130 and continue with: 1306 / 215

Advancing to step 6:
215 goes into 1306 6 times with a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 1426.0
If we subtract 1290 from 1306, we get 16.
Include the next digit (9) from the dividend after 16, then repeat: 169 / 215

Going ahead to step 7:
The number 215 fits into 169 0 times, leaving a remainder of 169.
Write down 0 as next digit of the result. 
Result so far: 14260.0
If we take 0 away from 169, we end up with 169.
Include the next digit (9) from the dividend after 169, then repeat: 1699 / 215

Let's proceed to step 8:
215 goes into 1699 7 times with a remainder of 194.
The number 7 becomes the next digit in our result. 
Result so far: 142607.0
Deduct 1505 from 1699 and we're left with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Step 9:
The number 215 fits into 1940 9 times, leaving a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 142607.9
The remainder is 5 after subtracting 1935 from 1940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 10:
When dividing 50 by 215, we get 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 142607.9
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 11:
The number 215 fits into 500 2 times, leaving a remainder of 70.
Use 2 as the next digit of our solution. 
Result so far: 142607.902
Subtracting 430 from 500 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 12:
The number 215 fits into 700 3 times, leaving a remainder of 55.
The next digit of our result is 3. 
Result so far: 142607.9023
The remainder is 55 after subtracting 645 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 13:
If we divide 550 by 215, we get 2 and a remainder of 120.
Put 2 as the next digit of the answer. 
Result so far: 142607.90232
If we take 430 away from 550, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 14:
1200 divided by 215 is 5 with a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 142607.902325
Subtract 1075 from 1200 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 15:
215 can be fit into 1250 5 times, resulting in a remainder of 175.
Put 5 as the next digit of the answer. 
Result so far: 142607.9023255
If we take 1075 away from 1250, we end up with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

The final result is 142607.9023255 with a remainder of 1.75e-06.