671312 ÷ 66 
The aim is to understand the frequency of 66 in 671312.

Moving on to step 1:
The number 66 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 66

Moving on to step 2:
When dividing 67 by 66, we get 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 66 from 67 to get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 66

Let's proceed to step 3:
11 divided by 66 is 0 with a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtracting 0 from 11 leaves us with 11.
Append the next digit (3) from the dividend to 11 and continue with: 113 / 66

Let's proceed to step 4:
66 can be fit into 113 1 times, resulting in a remainder of 47.
The next digit of our result is 1. 
Result so far: 101.0
Subtracting 66 from 113 leaves us with 47.
Grab the next digit (1) from the dividend, add it to 47, then carry on: 471 / 66

On to step 5:
66 goes into 471 7 times with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 1017.0
Subtract 462 from 471 to get 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 66

On to step 6:
66 goes into 92 1 times with a remainder of 26.
Record the quotient 1 as the next digit in the result. 
Result so far: 10171.0
If we subtract 66 from 92, we 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.

Let's proceed to step 7:
When dividing 260 by 66, we get 3 with a remainder of 62.
The next digit of our result is 3. 
Result so far: 10171.3
Subtracting 198 from 260 leaves us 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.

Advancing to step 8:
If we divide 620 by 66, we get 9 and a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 10171.39
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.

Step 9:
The number 66 fits into 260 3 times, leaving a remainder of 62.
Use 3 as the next digit of our solution. 
Result so far: 10171.393
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.

Moving on to step 10:
66 goes into 620 9 times with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 10171.3939
If we subtract 594 from 620, we 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.

Let's proceed to step 11:
66 can be fit into 260 3 times, resulting in a remainder of 62.
Write down 3 as next digit of the result. 
Result so far: 10171.39393
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 12:
620 divided by 66 is 9 with a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 10171.393939
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:
260 divided by 66 is 3 with a remainder of 62.
Write down 3 as next digit of the result. 
Result so far: 10171.3939393
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.

Moving on to step 14:
620 divided by 66 is 9 with a remainder of 26.
Record the quotient 9 as the next digit in the result. 
Result so far: 10171.39393939
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.

After the division, we end up with 10171.39393939 and a remainder of 2.6e-08.