786989 ÷ 66 
The aim is to understand the frequency of 66 in 786989.

Moving on to step 1:
7 divided by 66 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 66

On to step 2:
78 divided by 66 is 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 66 from 78, we get 12.
Bring next digit (6) of the dividend behind the 12 and repeat the process: 126 / 66

Advancing to step 3:
126 divided by 66 is 1 with a remainder of 60.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 66 from 126 leaves us with 60.
Bring next digit (9) of the dividend behind the 60 and repeat the process: 609 / 66

Let's proceed to step 4:
When dividing 609 by 66, we get 9 with a remainder of 15.
The number 9 becomes the next digit in our result. 
Result so far: 119.0
Deduct 594 from 609 and we're left with 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 66

Step 5:
66 can be fit into 158 2 times, resulting in a remainder of 26.
The next digit of our result is 2. 
Result so far: 1192.0
If we subtract 132 from 158, we get 26.
Grab the next digit (9) from the dividend, add it to 26, then carry on: 269 / 66

On to step 6:
66 goes into 269 4 times with a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 11924.0
Subtracting 264 from 269 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
50 divided by 66 is 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 11924.0
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 8:
If we divide 500 by 66, we get 7 and a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 11924.07
Deduct 462 from 500 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 9:
66 goes into 380 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 11924.075
Subtract 330 from 380 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 10:
When dividing 500 by 66, we get 7 with a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 11924.0757
If we subtract 462 from 500, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 11:
380 divided by 66 is 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 11924.07575
If we subtract 330 from 380, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 12:
66 goes into 500 7 times with a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 11924.075757
The remainder is 38 after subtracting 462 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 13:
The number 66 fits into 380 5 times, leaving a remainder of 50.
The next digit of our result is 5. 
Result so far: 11924.0757575
Subtract 330 from 380 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 14:
The number 66 fits into 500 7 times, leaving a remainder of 38.
The next digit of our result is 7. 
Result so far: 11924.07575757
If we subtract 462 from 500, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

After the division, we end up with 11924.07575757 and a remainder of 3.8e-08.