650036 ÷ 66 
The aim is to understand the frequency of 66 in 650036.

On to step 1:
6 divided by 66 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 66

Moving on to step 2:
66 goes into 65 0 times with a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 65 and we're left with 65.
Grab the next digit (0) from the dividend, add it to 65, then carry on: 650 / 66

Let's proceed to step 3:
650 divided by 66 is 9 with a remainder of 56.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 594 from 650 and we're left with 56.
Include the next digit (0) from the dividend after 56, then repeat: 560 / 66

Advancing to step 4:
66 goes into 560 8 times with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 98.0
If we subtract 528 from 560, we get 32.
Take the next digit (3) from the dividend and append it to 32, then repeat: 323 / 66

On to step 5:
When dividing 323 by 66, we get 4 with a remainder of 59.
Put 4 as the next digit of the answer. 
Result so far: 984.0
Deduct 264 from 323 and we're left with 59.
Take the next digit (6) from the dividend and append it to 59, then repeat: 596 / 66

Going ahead to step 6:
66 can be fit into 596 9 times, resulting in a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 9849.0
The remainder is 2 after subtracting 594 from 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
The number 66 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9849.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
66 goes into 200 3 times with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 9849.03
The remainder is 2 after subtracting 198 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
20 divided by 66 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 9849.03
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
66 can be fit into 200 3 times, resulting in a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 9849.0303
If we take 198 away from 200, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 11:
The number 66 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 9849.0303
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 12:
When dividing 200 by 66, we get 3 with a remainder of 2.
The next digit of our result is 3. 
Result so far: 9849.030303
Deduct 198 from 200 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 13:
66 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9849.030303
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
If we divide 200 by 66, we get 3 and a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 9849.03030303
Subtracting 198 from 200 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 9849.03030303, with a leftover of 2e-09.