We're dividing 66084997 by 665 
The aim is to understand the frequency of 665 in 66084997.

Advancing to step 1:
665 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 665

Going ahead to step 2:
665 can be fit into 66 0 times, resulting in a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Fetch the next digit (0) from the dividend, attach it to 66 and continue: 660 / 665

Advancing to step 3:
When dividing 660 by 665, we get 0 with a remainder of 660.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 660 and we're left with 660.
Append the next digit (8) from the dividend to 660 and continue with: 6608 / 665

Moving on to step 4:
665 goes into 6608 9 times with a remainder of 623.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 5985 from 6608 to get 623.
Take the next digit (4) from the dividend and append it to 623, then repeat: 6234 / 665

Going ahead to step 5:
When dividing 6234 by 665, we get 9 with a remainder of 249.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
The remainder is 249 after subtracting 5985 from 6234.
Append the next digit (9) from the dividend to 249 and continue with: 2499 / 665

Step 6:
The number 665 fits into 2499 3 times, leaving a remainder of 504.
Use 3 as the next digit of our solution. 
Result so far: 993.0
Deduct 1995 from 2499 and we're left with 504.
Fetch the next digit (9) from the dividend, attach it to 504 and continue: 5049 / 665

Step 7:
5049 divided by 665 is 7 with a remainder of 394.
The next digit of our result is 7. 
Result so far: 9937.0
If we take 4655 away from 5049, we end up with 394.
Bring next digit (7) of the dividend behind the 394 and repeat the process: 3947 / 665

Going ahead to step 8:
665 can be fit into 3947 5 times, resulting in a remainder of 622.
Write down 5 as next digit of the result. 
Result so far: 99375.0
The remainder is 622 after subtracting 3325 from 3947.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Moving on to step 9:
665 can be fit into 6220 9 times, resulting in a remainder of 235.
Use 9 as the next digit of our solution. 
Result so far: 99375.9
The remainder is 235 after subtracting 5985 from 6220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 10:
If we divide 2350 by 665, we get 3 and a remainder of 355.
The number 3 becomes the next digit in our result. 
Result so far: 99375.93
If we take 1995 away from 2350, we end up with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

On to step 11:
If we divide 3550 by 665, we get 5 and a remainder of 225.
Record the quotient 5 as the next digit in the result. 
Result so far: 99375.935
Subtract 3325 from 3550 to get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Going ahead to step 12:
When dividing 2250 by 665, we get 3 with a remainder of 255.
Put 3 as the next digit of the answer. 
Result so far: 99375.9353
The remainder is 255 after subtracting 1995 from 2250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Step 13:
2550 divided by 665 is 3 with a remainder of 555.
The next digit of our result is 3. 
Result so far: 99375.93533
Subtract 1995 from 2550 to get 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

After the division, we end up with 99375.93533 and a remainder of 0.000555.