66864809 divided by 308 
The aim is to understand the frequency of 308 in 66864809.

Going ahead to step 1:
308 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 308

Step 2:
When dividing 66 by 308, we get 0 with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Append the next digit (8) from the dividend to 66 and continue with: 668 / 308

Let's proceed to step 3:
308 can be fit into 668 2 times, resulting in a remainder of 52.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 52 after subtracting 616 from 668.
Fetch the next digit (6) from the dividend, attach it to 52 and continue: 526 / 308

Going ahead to step 4:
The number 308 fits into 526 1 times, leaving a remainder of 218.
Use 1 as the next digit of our solution. 
Result so far: 21.0
The remainder is 218 after subtracting 308 from 526.
Bring next digit (4) of the dividend behind the 218 and repeat the process: 2184 / 308

Moving on to step 5:
308 goes into 2184 7 times with a remainder of 28.
Record the quotient 7 as the next digit in the result. 
Result so far: 217.0
Deduct 2156 from 2184 and we're left with 28.
Bring next digit (8) of the dividend behind the 28 and repeat the process: 288 / 308

Moving on to step 6:
If we divide 288 by 308, we get 0 and a remainder of 288.
Record the quotient 0 as the next digit in the result. 
Result so far: 2170.0
The remainder is 288 after subtracting 0 from 288.
Take the next digit (0) from the dividend and append it to 288, then repeat: 2880 / 308

Step 7:
308 can be fit into 2880 9 times, resulting in a remainder of 108.
Put 9 as the next digit of the answer. 
Result so far: 21709.0
Subtract 2772 from 2880 to get 108.
Append the next digit (9) from the dividend to 108 and continue with: 1089 / 308

On to step 8:
308 can be fit into 1089 3 times, resulting in a remainder of 165.
Write down 3 as next digit of the result. 
Result so far: 217093.0
If we take 924 away from 1089, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Step 9:
308 goes into 1650 5 times with a remainder of 110.
Write down 5 as next digit of the result. 
Result so far: 217093.5
Subtract 1540 from 1650 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 10:
1100 divided by 308 is 3 with a remainder of 176.
The number 3 becomes the next digit in our result. 
Result so far: 217093.53
The remainder is 176 after subtracting 924 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

On to step 11:
The number 308 fits into 1760 5 times, leaving a remainder of 220.
Record the quotient 5 as the next digit in the result. 
Result so far: 217093.535
Deduct 1540 from 1760 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 12:
When dividing 2200 by 308, we get 7 with a remainder of 44.
Use 7 as the next digit of our solution. 
Result so far: 217093.5357
If we take 2156 away from 2200, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 13:
308 goes into 440 1 times with a remainder of 132.
Use 1 as the next digit of our solution. 
Result so far: 217093.53571
Subtract 308 from 440 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 14:
1320 divided by 308 is 4 with a remainder of 88.
Put 4 as the next digit of the answer. 
Result so far: 217093.535714
Subtracting 1232 from 1320 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

On to step 15:
880 divided by 308 is 2 with a remainder of 264.
Write down 2 as next digit of the result. 
Result so far: 217093.5357142
Deduct 616 from 880 and we're left with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Advancing to step 16:
308 goes into 2640 8 times with a remainder of 176.
The next digit of our result is 8. 
Result so far: 217093.53571428
The remainder is 176 after subtracting 2464 from 2640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

After the division, we end up with 217093.53571428 and a remainder of 1.76e-07.