We're dividing 357020 by 66 
The aim is to understand the frequency of 66 in 357020.

Moving on to step 1:
66 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 66

Step 2:
If we divide 35 by 66, we get 0 and a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Bring next digit (7) of the dividend behind the 35 and repeat the process: 357 / 66

Step 3:
66 goes into 357 5 times with a remainder of 27.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 27 after subtracting 330 from 357.
Fetch the next digit (0) from the dividend, attach it to 27 and continue: 270 / 66

Advancing to step 4:
270 divided by 66 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 54.0
If we subtract 264 from 270, we get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 66

Moving on to step 5:
When dividing 62 by 66, we get 0 with a remainder of 62.
Record the quotient 0 as the next digit in the result. 
Result so far: 540.0
If we take 0 away from 62, we end up with 62.
Bring next digit (0) of the dividend behind the 62 and repeat the process: 620 / 66

Going ahead to step 6:
The number 66 fits into 620 9 times, leaving a remainder of 26.
Put 9 as the next digit of the answer. 
Result so far: 5409.0
Subtracting 594 from 620 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 7:
260 divided by 66 is 3 with a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 5409.3
Subtract 198 from 260 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 8:
When dividing 620 by 66, we get 9 with a remainder of 26.
The next digit of our result is 9. 
Result so far: 5409.39
Subtracting 594 from 620 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 9:
66 goes into 260 3 times with a remainder of 62.
Write down 3 as next digit of the result. 
Result so far: 5409.393
If we take 198 away from 260, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 10:
When dividing 620 by 66, we get 9 with a remainder of 26.
The next digit of our result is 9. 
Result so far: 5409.3939
Deduct 594 from 620 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 11:
The number 66 fits into 260 3 times, leaving a remainder of 62.
The next digit of our result is 3. 
Result so far: 5409.39393
If we subtract 198 from 260, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 12:
If we divide 620 by 66, we get 9 and a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 5409.393939
Subtract 594 from 620 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 13:
When dividing 260 by 66, we get 3 with a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 5409.3939393
Subtract 198 from 260 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 14:
When dividing 620 by 66, we get 9 with a remainder of 26.
Record the quotient 9 as the next digit in the result. 
Result so far: 5409.39393939
Deduct 594 from 620 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

In conclusion, the division gives 5409.39393939 with a balance of 2.6e-08.