We look at the division of 595600 by 66 
The aim is to understand the frequency of 66 in 595600.

On to step 1:
66 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 66

Advancing to step 2:
59 divided by 66 is 0 with a remainder of 59.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 59 and we're left with 59.
Append the next digit (5) from the dividend to 59 and continue with: 595 / 66

Going ahead to step 3:
If we divide 595 by 66, we get 9 and a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 594 from 595 and we're left with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 66

Advancing to step 4:
16 divided by 66 is 0 with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 90.0
The remainder is 16 after subtracting 0 from 16.
Append the next digit (0) from the dividend to 16 and continue with: 160 / 66

Going ahead to step 5:
66 goes into 160 2 times with a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 902.0
The remainder is 28 after subtracting 132 from 160.
Bring next digit (0) of the dividend behind the 28 and repeat the process: 280 / 66

Let's proceed to step 6:
When dividing 280 by 66, we get 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 9024.0
If we subtract 264 from 280, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
160 divided by 66 is 2 with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 9024.2
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 8:
66 can be fit into 280 4 times, resulting in a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 9024.24
If we subtract 264 from 280, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
160 divided by 66 is 2 with a remainder of 28.
The next digit of our result is 2. 
Result so far: 9024.242
Deduct 132 from 160 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 10:
When dividing 280 by 66, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 9024.2424
Subtract 264 from 280 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 11:
The number 66 fits into 160 2 times, leaving a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 9024.24242
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 12:
When dividing 280 by 66, we get 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 9024.242424
Deduct 264 from 280 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
66 goes into 160 2 times with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 9024.2424242
Subtract 132 from 160 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 14:
If we divide 280 by 66, we get 4 and a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 9024.24242424
Subtract 264 from 280 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 9024.24242424 with a remaining 1.6e-08.