We're dividing 666991 by 71 
The aim is to understand the frequency of 71 in 666991.

Let's proceed to step 1:
71 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
If we subtract 0 from 6, we get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 71

Advancing to step 2:
66 divided by 71 is 0 with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Include the next digit (6) from the dividend after 66, then repeat: 666 / 71

Step 3:
71 goes into 666 9 times with a remainder of 27.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we take 639 away from 666, we end up with 27.
Fetch the next digit (9) from the dividend, attach it to 27 and continue: 279 / 71

Step 4:
The number 71 fits into 279 3 times, leaving a remainder of 66.
Put 3 as the next digit of the answer. 
Result so far: 93.0
If we take 213 away from 279, we end up with 66.
Take the next digit (9) from the dividend and append it to 66, then repeat: 669 / 71

Advancing to step 5:
669 divided by 71 is 9 with a remainder of 30.
Put 9 as the next digit of the answer. 
Result so far: 939.0
If we take 639 away from 669, we end up with 30.
Append the next digit (1) from the dividend to 30 and continue with: 301 / 71

Let's proceed to step 6:
The number 71 fits into 301 4 times, leaving a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 9394.0
Subtracting 284 from 301 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
When dividing 170 by 71, we get 2 with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 9394.2
The remainder is 28 after subtracting 142 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 8:
71 can be fit into 280 3 times, resulting in a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 9394.23
If we take 213 away from 280, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 9:
670 divided by 71 is 9 with a remainder of 31.
Use 9 as the next digit of our solution. 
Result so far: 9394.239
Subtracting 639 from 670 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 10:
The number 71 fits into 310 4 times, leaving a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 9394.2394
The remainder is 26 after subtracting 284 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 11:
260 divided by 71 is 3 with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 9394.23943
The remainder is 47 after subtracting 213 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 12:
The number 71 fits into 470 6 times, leaving a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 9394.239436
If we take 426 away from 470, 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.

Step 13:
71 can be fit into 440 6 times, resulting in a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 9394.2394366
Deduct 426 from 440 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.

The quotient of the division is 9394.2394366, and the remainder is 1.4e-07.