66560137 ÷ 12 
The aim is to understand the frequency of 12 in 66560137.

Step 1:
When dividing 6 by 12, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 12

Step 2:
66 divided by 12 is 5 with a remainder of 6.
The next digit of our result is 5. 
Result so far: 5.0
If we subtract 60 from 66, we get 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 12

Let's proceed to step 3:
The number 12 fits into 65 5 times, leaving a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 55.0
If we take 60 away from 65, we end up with 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 12

Step 4:
12 goes into 56 4 times with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 554.0
If we subtract 48 from 56, we get 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 12

Advancing to step 5:
80 divided by 12 is 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 5546.0
Deduct 72 from 80 and we're left with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 12

On to step 6:
81 divided by 12 is 6 with a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 55466.0
Subtract 72 from 81 to get 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 12

On to step 7:
93 divided by 12 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 554667.0
Subtract 84 from 93 to get 9.
Include the next digit (7) from the dividend after 9, then repeat: 97 / 12

On to step 8:
97 divided by 12 is 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 5546678.0
Subtracting 96 from 97 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
If we divide 10 by 12, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 5546678.0
Subtracting 0 from 10 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.

On to step 10:
100 divided by 12 is 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 5546678.08
If we subtract 96 from 100, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 11:
When dividing 40 by 12, we get 3 with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 5546678.083
If we take 36 away from 40, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 12:
40 divided by 12 is 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 5546678.0833
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The quotient of the division is 5546678.0833, and the remainder is 4e-05.