339015 divided by 66 
The aim is to understand the frequency of 66 in 339015.

Moving on to step 1:
When dividing 3 by 66, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 66

Let's proceed to step 2:
If we divide 33 by 66, we get 0 and a remainder of 33.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 33, we end up with 33.
Grab the next digit (9) from the dividend, add it to 33, then carry on: 339 / 66

Going ahead to step 3:
66 goes into 339 5 times with a remainder of 9.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 330 away from 339, we end up with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 66

Advancing to step 4:
The number 66 fits into 90 1 times, leaving a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 51.0
Subtracting 66 from 90 leaves us with 24.
Grab the next digit (1) from the dividend, add it to 24, then carry on: 241 / 66

On to step 5:
The number 66 fits into 241 3 times, leaving a remainder of 43.
Record the quotient 3 as the next digit in the result. 
Result so far: 513.0
The remainder is 43 after subtracting 198 from 241.
Grab the next digit (5) from the dividend, add it to 43, then carry on: 435 / 66

Let's proceed to step 6:
If we divide 435 by 66, we get 6 and a remainder of 39.
Write down 6 as next digit of the result. 
Result so far: 5136.0
Deduct 396 from 435 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 7:
When dividing 390 by 66, we get 5 with a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 5136.5
Deduct 330 from 390 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 8:
The number 66 fits into 600 9 times, leaving a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 5136.59
Subtracting 594 from 600 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
66 can be fit into 60 0 times, resulting in a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 5136.59
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 10:
66 goes into 600 9 times with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 5136.5909
Subtract 594 from 600 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 11:
The number 66 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 5136.5909
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 12:
When dividing 600 by 66, we get 9 with a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 5136.590909
Deduct 594 from 600 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
The number 66 fits into 60 0 times, leaving a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 5136.590909
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 14:
If we divide 600 by 66, we get 9 and a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 5136.59090909
Subtracting 594 from 600 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 5136.59090909 with a remainder of 6e-09.