66843651 divided by 135 
The aim is to understand the frequency of 135 in 66843651.

Moving on to step 1:
The number 135 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 135

Moving on to step 2:
If we divide 66 by 135, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Include the next digit (8) from the dividend after 66, then repeat: 668 / 135

Moving on to step 3:
135 can be fit into 668 4 times, resulting in a remainder of 128.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 540 from 668, we get 128.
Take the next digit (4) from the dividend and append it to 128, then repeat: 1284 / 135

Moving on to step 4:
If we divide 1284 by 135, we get 9 and a remainder of 69.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
If we take 1215 away from 1284, we end up with 69.
Fetch the next digit (3) from the dividend, attach it to 69 and continue: 693 / 135

Let's proceed to step 5:
If we divide 693 by 135, we get 5 and a remainder of 18.
The next digit of our result is 5. 
Result so far: 495.0
Subtracting 675 from 693 leaves us with 18.
Bring next digit (6) of the dividend behind the 18 and repeat the process: 186 / 135

Advancing to step 6:
186 divided by 135 is 1 with a remainder of 51.
Record the quotient 1 as the next digit in the result. 
Result so far: 4951.0
If we subtract 135 from 186, we get 51.
Fetch the next digit (5) from the dividend, attach it to 51 and continue: 515 / 135

On to step 7:
135 can be fit into 515 3 times, resulting in a remainder of 110.
Write down 3 as next digit of the result. 
Result so far: 49513.0
Deduct 405 from 515 and we're left with 110.
Append the next digit (1) from the dividend to 110 and continue with: 1101 / 135

Let's proceed to step 8:
The number 135 fits into 1101 8 times, leaving a remainder of 21.
Record the quotient 8 as the next digit in the result. 
Result so far: 495138.0
The remainder is 21 after subtracting 1080 from 1101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 9:
135 goes into 210 1 times with a remainder of 75.
Use 1 as the next digit of our solution. 
Result so far: 495138.1
Subtract 135 from 210 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 10:
The number 135 fits into 750 5 times, leaving a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 495138.15
Subtracting 675 from 750 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 11:
If we divide 750 by 135, we get 5 and a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 495138.155
Subtract 675 from 750 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Our division results in 495138.155 with a remaining 0.0075.