We're dividing 66659204 by 215 
The aim is to understand the frequency of 215 in 66659204.

Moving on to step 1:
When dividing 6 by 215, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 215

Going ahead to step 2:
If we divide 66 by 215, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Append the next digit (6) from the dividend to 66 and continue with: 666 / 215

On to step 3:
When dividing 666 by 215, we get 3 with a remainder of 21.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 21 after subtracting 645 from 666.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 215

Going ahead to step 4:
If we divide 215 by 215, we get 1 and a remainder of 0.
The next digit of our result is 1. 
Result so far: 31.0
Deduct 215 from 215 and we're left with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 215

Going ahead to step 5:
9 divided by 215 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 310.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 215

Moving on to step 6:
When dividing 92 by 215, we get 0 with a remainder of 92.
Record the quotient 0 as the next digit in the result. 
Result so far: 3100.0
Subtracting 0 from 92 leaves us with 92.
Include the next digit (0) from the dividend after 92, then repeat: 920 / 215

Moving on to step 7:
920 divided by 215 is 4 with a remainder of 60.
Use 4 as the next digit of our solution. 
Result so far: 31004.0
The remainder is 60 after subtracting 860 from 920.
Bring next digit (4) of the dividend behind the 60 and repeat the process: 604 / 215

On to step 8:
215 goes into 604 2 times with a remainder of 174.
Use 2 as the next digit of our solution. 
Result so far: 310042.0
If we take 430 away from 604, we end up with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Let's proceed to step 9:
If we divide 1740 by 215, we get 8 and a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 310042.8
If we subtract 1720 from 1740, 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.

Advancing to step 10:
If we divide 200 by 215, we get 0 and a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 310042.8
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 11:
215 goes into 2000 9 times with a remainder of 65.
Write down 9 as next digit of the result. 
Result so far: 310042.809
If we subtract 1935 from 2000, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 12:
The number 215 fits into 650 3 times, leaving a remainder of 5.
The next digit of our result is 3. 
Result so far: 310042.8093
The remainder is 5 after subtracting 645 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 13:
215 goes into 50 0 times with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 310042.8093
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 14:
When dividing 500 by 215, we get 2 with a remainder of 70.
Use 2 as the next digit of our solution. 
Result so far: 310042.809302
If we take 430 away from 500, we end up 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.

Going ahead to step 15:
When dividing 700 by 215, we get 3 with a remainder of 55.
Record the quotient 3 as the next digit in the result. 
Result so far: 310042.8093023
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.

Going ahead to step 16:
550 divided by 215 is 2 with a remainder of 120.
Use 2 as the next digit of our solution. 
Result so far: 310042.80930232
The remainder is 120 after subtracting 430 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

After the division, we end up with 310042.80930232 and a remainder of 1.2e-07.