We're dividing 137778 by 66 
The aim is to understand the frequency of 66 in 137778.

Advancing to step 1:
When dividing 1 by 66, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 66

On to step 2:
The number 66 fits into 13 0 times, leaving a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 66

Step 3:
The number 66 fits into 137 2 times, leaving a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 132 away from 137, we end up with 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 66

Going ahead to step 4:
When dividing 57 by 66, we get 0 with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 20.0
Subtracting 0 from 57 leaves us with 57.
Take the next digit (7) from the dividend and append it to 57, then repeat: 577 / 66

Step 5:
66 goes into 577 8 times with a remainder of 49.
The next digit of our result is 8. 
Result so far: 208.0
If we subtract 528 from 577, we get 49.
Grab the next digit (8) from the dividend, add it to 49, then carry on: 498 / 66

On to step 6:
When dividing 498 by 66, we get 7 with a remainder of 36.
The number 7 becomes the next digit in our result. 
Result so far: 2087.0
Subtracting 462 from 498 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 7:
The number 66 fits into 360 5 times, leaving a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 2087.5
The remainder is 30 after subtracting 330 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
300 divided by 66 is 4 with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 2087.54
If we subtract 264 from 300, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 9:
The number 66 fits into 360 5 times, leaving a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 2087.545
The remainder is 30 after subtracting 330 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
The number 66 fits into 300 4 times, leaving a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 2087.5454
If we subtract 264 from 300, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 11:
66 goes into 360 5 times with a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 2087.54545
Subtract 330 from 360 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 12:
66 can be fit into 300 4 times, resulting in a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 2087.545454
If we take 264 away from 300, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 13:
360 divided by 66 is 5 with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 2087.5454545
Subtract 330 from 360 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 14:
300 divided by 66 is 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 2087.54545454
If we take 264 away from 300, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final result is 2087.54545454 with a remainder of 3.6e-08.