669866 divided by 71 
The aim is to understand the frequency of 71 in 669866.

On to step 1:
6 divided by 71 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 71

Advancing to step 2:
The number 71 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 71

Step 3:
If we divide 669 by 71, we get 9 and a remainder of 30.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtracting 639 from 669 leaves us with 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 71

Advancing to step 4:
If we divide 308 by 71, we get 4 and a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 94.0
Subtracting 284 from 308 leaves us with 24.
Include the next digit (6) from the dividend after 24, then repeat: 246 / 71

Step 5:
The number 71 fits into 246 3 times, leaving a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 943.0
If we take 213 away from 246, we end up with 33.
Bring next digit (6) of the dividend behind the 33 and repeat the process: 336 / 71

Moving on to step 6:
71 can be fit into 336 4 times, resulting in a remainder of 52.
Write down 4 as next digit of the result. 
Result so far: 9434.0
If we take 284 away from 336, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 7:
71 goes into 520 7 times with a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 9434.7
If we subtract 497 from 520, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 8:
If we divide 230 by 71, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 9434.73
If we subtract 213 from 230, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 9:
When dividing 170 by 71, we get 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 9434.732
Subtract 142 from 170 to get 28.
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 10:
71 goes into 280 3 times with a remainder of 67.
Write down 3 as next digit of the result. 
Result so far: 9434.7323
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.

Moving on to step 11:
670 divided by 71 is 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 9434.73239
The remainder is 31 after subtracting 639 from 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 12:
310 divided by 71 is 4 with a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 9434.732394
Deduct 284 from 310 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 13:
If we divide 260 by 71, we get 3 and a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 9434.7323943
If we take 213 away from 260, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 14:
The number 71 fits into 470 6 times, leaving a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 9434.73239436
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.

The quotient of the division is 9434.73239436, and the remainder is 4.4e-08.