We look at the division of 870984 by 71 
The aim is to understand the frequency of 71 in 870984.

Moving on to step 1:
When dividing 8 by 71, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 71

On to step 2:
If we divide 87 by 71, we get 1 and a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 16 after subtracting 71 from 87.
Bring next digit (0) of the dividend behind the 16 and repeat the process: 160 / 71

Let's proceed to step 3:
The number 71 fits into 160 2 times, leaving a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 12.0
The remainder is 18 after subtracting 142 from 160.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 71

On to step 4:
When dividing 189 by 71, we get 2 with a remainder of 47.
The next digit of our result is 2. 
Result so far: 122.0
The remainder is 47 after subtracting 142 from 189.
Include the next digit (8) from the dividend after 47, then repeat: 478 / 71

Let's proceed to step 5:
When dividing 478 by 71, we get 6 with a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 1226.0
Subtracting 426 from 478 leaves us with 52.
Include the next digit (4) from the dividend after 52, then repeat: 524 / 71

Let's proceed to step 6:
The number 71 fits into 524 7 times, leaving a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 12267.0
If we take 497 away from 524, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 7:
The number 71 fits into 270 3 times, leaving a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 12267.3
If we take 213 away from 270, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 8:
The number 71 fits into 570 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 12267.38
Subtract 568 from 570 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
When dividing 20 by 71, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 12267.38
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 10:
The number 71 fits into 200 2 times, leaving a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 12267.3802
Subtracting 142 from 200 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 11:
When dividing 580 by 71, we get 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 12267.38028
The remainder is 12 after subtracting 568 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 12:
The number 71 fits into 120 1 times, leaving a remainder of 49.
The next digit of our result is 1. 
Result so far: 12267.380281
If we subtract 71 from 120, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 13:
When dividing 490 by 71, we get 6 with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 12267.3802816
Subtract 426 from 490 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 14:
The number 71 fits into 640 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 12267.38028169
Subtract 639 from 640 to 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.

The final result is 12267.38028169 with a remainder of 1e-09.