We look at the division of 390893 by 66 
The aim is to understand the frequency of 66 in 390893.

Going ahead to step 1:
The number 66 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 66

Going ahead to step 2:
When dividing 39 by 66, we get 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Append the next digit (0) from the dividend to 39 and continue with: 390 / 66

Moving on to step 3:
If we divide 390 by 66, we get 5 and a remainder of 60.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 330 from 390 to get 60.
Grab the next digit (8) from the dividend, add it to 60, then carry on: 608 / 66

Going ahead to step 4:
608 divided by 66 is 9 with a remainder of 14.
Write down 9 as next digit of the result. 
Result so far: 59.0
The remainder is 14 after subtracting 594 from 608.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 66

Going ahead to step 5:
66 goes into 149 2 times with a remainder of 17.
Put 2 as the next digit of the answer. 
Result so far: 592.0
If we take 132 away from 149, we end up with 17.
Append the next digit (3) from the dividend to 17 and continue with: 173 / 66

Step 6:
If we divide 173 by 66, we get 2 and a remainder of 41.
Record the quotient 2 as the next digit in the result. 
Result so far: 5922.0
Subtract 132 from 173 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 7:
If we divide 410 by 66, we get 6 and a remainder of 14.
The next digit of our result is 6. 
Result so far: 5922.6
Deduct 396 from 410 and we're left with 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 8:
If we divide 140 by 66, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 5922.62
Subtracting 132 from 140 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
If we divide 80 by 66, we get 1 and a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 5922.621
Subtracting 66 from 80 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 10:
The number 66 fits into 140 2 times, leaving a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 5922.6212
Subtracting 132 from 140 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 11:
When dividing 80 by 66, we get 1 with a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 5922.62121
If we subtract 66 from 80, 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.

Let's proceed to step 12:
66 goes into 140 2 times with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 5922.621212
Subtracting 132 from 140 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
66 goes into 80 1 times with a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 5922.6212121
Subtract 66 from 80 to 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.

Advancing to step 14:
140 divided by 66 is 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 5922.62121212
If we take 132 away from 140, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 5922.62121212 with a remaining 8e-09.