We're dividing 66816966 by 397 
The aim is to understand the frequency of 397 in 66816966.

Advancing to step 1:
When dividing 6 by 397, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 397

Advancing to step 2:
When dividing 66 by 397, we get 0 with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Take the next digit (8) from the dividend and append it to 66, then repeat: 668 / 397

Going ahead to step 3:
668 divided by 397 is 1 with a remainder of 271.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 397 away from 668, we end up with 271.
Take the next digit (1) from the dividend and append it to 271, then repeat: 2711 / 397

Let's proceed to step 4:
The number 397 fits into 2711 6 times, leaving a remainder of 329.
The next digit of our result is 6. 
Result so far: 16.0
Deduct 2382 from 2711 and we're left with 329.
Grab the next digit (6) from the dividend, add it to 329, then carry on: 3296 / 397

Advancing to step 5:
The number 397 fits into 3296 8 times, leaving a remainder of 120.
The number 8 becomes the next digit in our result. 
Result so far: 168.0
The remainder is 120 after subtracting 3176 from 3296.
Grab the next digit (9) from the dividend, add it to 120, then carry on: 1209 / 397

Step 6:
The number 397 fits into 1209 3 times, leaving a remainder of 18.
The next digit of our result is 3. 
Result so far: 1683.0
If we subtract 1191 from 1209, we get 18.
Include the next digit (6) from the dividend after 18, then repeat: 186 / 397

Advancing to step 7:
When dividing 186 by 397, we get 0 with a remainder of 186.
Record the quotient 0 as the next digit in the result. 
Result so far: 16830.0
If we subtract 0 from 186, we get 186.
Grab the next digit (6) from the dividend, add it to 186, then carry on: 1866 / 397

Going ahead to step 8:
397 goes into 1866 4 times with a remainder of 278.
Write down 4 as next digit of the result. 
Result so far: 168304.0
Subtracting 1588 from 1866 leaves us with 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Advancing to step 9:
397 can be fit into 2780 7 times, resulting in a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 168304.7
If we subtract 2779 from 2780, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 10:
10 divided by 397 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 168304.7
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 11:
When dividing 100 by 397, we get 0 with a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 168304.7
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Our division results in 168304.7 with a remaining 0.01.