571405 ÷ 66 
The aim is to understand the frequency of 66 in 571405.

Let's proceed to step 1:
The number 66 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 66

Advancing to step 2:
57 divided by 66 is 0 with a remainder of 57.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 57, we end up with 57.
Take the next digit (1) from the dividend and append it to 57, then repeat: 571 / 66

Moving on to step 3:
66 goes into 571 8 times with a remainder of 43.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 528 from 571 to get 43.
Fetch the next digit (4) from the dividend, attach it to 43 and continue: 434 / 66

On to step 4:
434 divided by 66 is 6 with a remainder of 38.
Use 6 as the next digit of our solution. 
Result so far: 86.0
Subtracting 396 from 434 leaves us with 38.
Include the next digit (0) from the dividend after 38, then repeat: 380 / 66

Advancing to step 5:
66 goes into 380 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 865.0
If we take 330 away from 380, we end up with 50.
Grab the next digit (5) from the dividend, add it to 50, then carry on: 505 / 66

Let's proceed to step 6:
505 divided by 66 is 7 with a remainder of 43.
Record the quotient 7 as the next digit in the result. 
Result so far: 8657.0
If we subtract 462 from 505, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 7:
66 goes into 430 6 times with a remainder of 34.
Use 6 as the next digit of our solution. 
Result so far: 8657.6
Subtract 396 from 430 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 8:
If we divide 340 by 66, we get 5 and a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 8657.65
Subtracting 330 from 340 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
66 goes into 100 1 times with a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 8657.651
Subtract 66 from 100 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 10:
The number 66 fits into 340 5 times, leaving a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 8657.6515
The remainder is 10 after subtracting 330 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
The number 66 fits into 100 1 times, leaving a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 8657.65151
If we take 66 away from 100, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 12:
340 divided by 66 is 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 8657.651515
If we take 330 away from 340, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 13:
If we divide 100 by 66, we get 1 and a remainder of 34.
The next digit of our result is 1. 
Result so far: 8657.6515151
Subtract 66 from 100 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 14:
The number 66 fits into 340 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 8657.65151515
Deduct 330 from 340 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 8657.65151515 with a remaining 1e-08.