Let's divide 85688400 by 66
The aim is to understand the frequency of 66 in 85688400.

Going ahead to step 1:
When dividing 8 by 66, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 66

Let's proceed to step 2:
If we divide 85 by 66, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 66 from 85 leaves us with 19.
Grab the next digit (6) from the dividend, add it to 19, then carry on: 196 / 66

Let's proceed to step 3:
The number 66 fits into 196 2 times, leaving a remainder of 64.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we take 132 away from 196, we end up with 64.
Take the next digit (8) from the dividend and append it to 64, then repeat: 648 / 66

Going ahead to step 4:
66 can be fit into 648 9 times, resulting in a remainder of 54.
Put 9 as the next digit of the answer. 
Result so far: 129.0
If we take 594 away from 648, we end up with 54.
Bring next digit (8) of the dividend behind the 54 and repeat the process: 548 / 66

Let's proceed to step 5:
548 divided by 66 is 8 with a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 1298.0
Deduct 528 from 548 and we're left with 20.
Fetch the next digit (4) from the dividend, attach it to 20 and continue: 204 / 66

Advancing to step 6:
When dividing 204 by 66, we get 3 with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 12983.0
Deduct 198 from 204 and we're left with 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 66

Step 7:
When dividing 60 by 66, we get 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 129830.0
The remainder is 60 after subtracting 0 from 60.
Fetch the next digit (0) from the dividend, attach it to 60 and continue: 600 / 66

Step 8:
66 can be fit into 600 9 times, resulting in a remainder of 6.
The next digit of our result is 9. 
Result so far: 1298309.0
If we take 594 away from 600, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
66 goes into 60 0 times with a remainder of 60.
The next digit of our result is 0. 
Result so far: 1298309.0
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 10:
66 can be fit into 600 9 times, resulting in a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 1298309.09
If we subtract 594 from 600, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 11:
66 goes into 60 0 times with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 1298309.09
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 12:
If we divide 600 by 66, we get 9 and a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 1298309.0909
Deduct 594 from 600 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 13:
60 divided by 66 is 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 1298309.0909
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 14:
600 divided by 66 is 9 with a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 1298309.090909
Subtract 594 from 600 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 15:
When dividing 60 by 66, we get 0 with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 1298309.090909
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 16:
The number 66 fits into 600 9 times, leaving a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 1298309.09090909
If we take 594 away from 600, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

In conclusion, the division gives 1298309.09090909 with a balance of 6e-09.