427201 divided by 66 
The aim is to understand the frequency of 66 in 427201.

Advancing to step 1:
4 divided by 66 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 66

Let's proceed to step 2:
42 divided by 66 is 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Fetch the next digit (7) from the dividend, attach it to 42 and continue: 427 / 66

Going ahead to step 3:
66 can be fit into 427 6 times, resulting in a remainder of 31.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 396 from 427 and we're left with 31.
Bring next digit (2) of the dividend behind the 31 and repeat the process: 312 / 66

Advancing to step 4:
The number 66 fits into 312 4 times, leaving a remainder of 48.
Put 4 as the next digit of the answer. 
Result so far: 64.0
The remainder is 48 after subtracting 264 from 312.
Take the next digit (0) from the dividend and append it to 48, then repeat: 480 / 66

Going ahead to step 5:
The number 66 fits into 480 7 times, leaving a remainder of 18.
The number 7 becomes the next digit in our result. 
Result so far: 647.0
If we take 462 away from 480, we end up with 18.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 66

Step 6:
If we divide 181 by 66, we get 2 and a remainder of 49.
The next digit of our result is 2. 
Result so far: 6472.0
The remainder is 49 after subtracting 132 from 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 7:
66 can be fit into 490 7 times, resulting in a remainder of 28.
Record the quotient 7 as the next digit in the result. 
Result so far: 6472.7
Subtract 462 from 490 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 8:
280 divided by 66 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 6472.74
The remainder is 16 after subtracting 264 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 9:
When dividing 160 by 66, we get 2 with a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 6472.742
Subtracting 132 from 160 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 10:
66 goes into 280 4 times with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 6472.7424
The remainder is 16 after subtracting 264 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
If we divide 160 by 66, we get 2 and a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 6472.74242
Deduct 132 from 160 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 12:
66 can be fit into 280 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 6472.742424
Subtracting 264 from 280 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 13:
66 can be fit into 160 2 times, resulting in a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 6472.7424242
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 14:
When dividing 280 by 66, we get 4 with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 6472.74242424
Subtract 264 from 280 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 6472.74242424 and a remainder of 1.6e-08.