We look at the division of 660188 by 23 
The aim is to understand the frequency of 23 in 660188.

On to step 1:
23 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 23

Step 2:
If we divide 66 by 23, we get 2 and a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 46 from 66, we get 20.
Bring next digit (0) of the dividend behind the 20 and repeat the process: 200 / 23

Step 3:
When dividing 200 by 23, we get 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 28.0
The remainder is 16 after subtracting 184 from 200.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 23

Step 4:
23 goes into 161 7 times with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 287.0
If we take 161 away from 161, we end up with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 23

Advancing to step 5:
When dividing 8 by 23, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 2870.0
If we subtract 0 from 8, we get 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 23

Let's proceed to step 6:
88 divided by 23 is 3 with a remainder of 19.
Use 3 as the next digit of our solution. 
Result so far: 28703.0
If we subtract 69 from 88, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
23 can be fit into 190 8 times, resulting in a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 28703.8
Subtract 184 from 190 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 8:
60 divided by 23 is 2 with a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 28703.82
If we subtract 46 from 60, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
When dividing 140 by 23, we get 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 28703.826
The remainder is 2 after subtracting 138 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 10:
The number 23 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 28703.826
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.

Let's proceed to step 11:
When dividing 200 by 23, we get 8 with a remainder of 16.
The next digit of our result is 8. 
Result so far: 28703.82608
Subtract 184 from 200 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.

Let's proceed to step 12:
160 divided by 23 is 6 with a remainder of 22.
Record the quotient 6 as the next digit in the result. 
Result so far: 28703.826086
Subtracting 138 from 160 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 13:
23 goes into 220 9 times with a remainder of 13.
Record the quotient 9 as the next digit in the result. 
Result so far: 28703.8260869
Subtracting 207 from 220 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 14:
23 goes into 130 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 28703.82608695
If we take 115 away from 130, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 28703.82608695, with a leftover of 1.5e-08.