Let's divide 960631 by 66
The aim is to understand the frequency of 66 in 960631.

Moving on to step 1:
When dividing 9 by 66, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 66

Advancing to step 2:
66 goes into 96 1 times with a remainder of 30.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 66 from 96 leaves us with 30.
Grab the next digit (0) from the dividend, add it to 30, then carry on: 300 / 66

Moving on to step 3:
66 goes into 300 4 times with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 14.0
If we subtract 264 from 300, we get 36.
Grab the next digit (6) from the dividend, add it to 36, then carry on: 366 / 66

Moving on to step 4:
366 divided by 66 is 5 with a remainder of 36.
Use 5 as the next digit of our solution. 
Result so far: 145.0
The remainder is 36 after subtracting 330 from 366.
Append the next digit (3) from the dividend to 36 and continue with: 363 / 66

On to step 5:
66 can be fit into 363 5 times, resulting in a remainder of 33.
Put 5 as the next digit of the answer. 
Result so far: 1455.0
If we take 330 away from 363, we end up with 33.
Grab the next digit (1) from the dividend, add it to 33, then carry on: 331 / 66

Advancing to step 6:
66 goes into 331 5 times with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 14555.0
Deduct 330 from 331 and we're left 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.

Let's proceed to step 7:
When dividing 10 by 66, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 14555.0
If we take 0 away from 10, we end up 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.

Advancing to step 8:
If we divide 100 by 66, we get 1 and a remainder of 34.
The next digit of our result is 1. 
Result so far: 14555.01
Subtracting 66 from 100 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 9:
66 can be fit into 340 5 times, resulting in a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 14555.015
Subtract 330 from 340 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
If we divide 100 by 66, we get 1 and a remainder of 34.
Record the quotient 1 as the next digit in the result. 
Result so far: 14555.0151
Subtract 66 from 100 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 11:
If we divide 340 by 66, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 14555.01515
The remainder is 10 after subtracting 330 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
The number 66 fits into 100 1 times, leaving a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 14555.015151
If we subtract 66 from 100, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 13:
66 can be fit into 340 5 times, resulting in a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 14555.0151515
The remainder is 10 after subtracting 330 from 340.
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 14:
66 can be fit into 100 1 times, resulting in a remainder of 34.
Write down 1 as next digit of the result. 
Result so far: 14555.01515151
If we take 66 away from 100, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

After the division, we end up with 14555.01515151 and a remainder of 3.4e-08.