86268953 divided by 66 
The aim is to understand the frequency of 66 in 86268953.

Advancing to step 1:
8 divided by 66 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 66

Moving on to step 2:
When dividing 86 by 66, we get 1 with a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 66 from 86 and we're left with 20.
Fetch the next digit (2) from the dividend, attach it to 20 and continue: 202 / 66

Going ahead to step 3:
66 goes into 202 3 times with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we take 198 away from 202, we end up with 4.
Grab the next digit (6) from the dividend, add it to 4, then carry on: 46 / 66

Going ahead to step 4:
The number 66 fits into 46 0 times, leaving a remainder of 46.
The number 0 becomes the next digit in our result. 
Result so far: 130.0
Subtract 0 from 46 to get 46.
Include the next digit (8) from the dividend after 46, then repeat: 468 / 66

On to step 5:
66 goes into 468 7 times with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 1307.0
If we subtract 462 from 468, we get 6.
Take the next digit (9) from the dividend and append it to 6, then repeat: 69 / 66

Advancing to step 6:
When dividing 69 by 66, we get 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 13071.0
If we subtract 66 from 69, we get 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 66

Step 7:
If we divide 35 by 66, we get 0 and a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 130710.0
If we subtract 0 from 35, we get 35.
Include the next digit (3) from the dividend after 35, then repeat: 353 / 66

Moving on to step 8:
66 can be fit into 353 5 times, resulting in a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 1307105.0
Deduct 330 from 353 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 9:
When dividing 230 by 66, we get 3 with a remainder of 32.
Write down 3 as next digit of the result. 
Result so far: 1307105.3
Deduct 198 from 230 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 10:
66 goes into 320 4 times with a remainder of 56.
The next digit of our result is 4. 
Result so far: 1307105.34
The remainder is 56 after subtracting 264 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 11:
If we divide 560 by 66, we get 8 and a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 1307105.348
If we take 528 away from 560, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 12:
320 divided by 66 is 4 with a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 1307105.3484
If we take 264 away from 320, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 13:
66 can be fit into 560 8 times, resulting in a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 1307105.34848
If we take 528 away from 560, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 14:
If we divide 320 by 66, we get 4 and a remainder of 56.
The next digit of our result is 4. 
Result so far: 1307105.348484
Subtracting 264 from 320 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 15:
If we divide 560 by 66, we get 8 and a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 1307105.3484848
Deduct 528 from 560 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 16:
The number 66 fits into 320 4 times, leaving a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 1307105.34848484
The remainder is 56 after subtracting 264 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final result is 1307105.34848484 with a remainder of 5.6e-08.