We look at the division of 510284 by 71 
The aim is to understand the frequency of 71 in 510284.

Step 1:
71 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 71

On to step 2:
71 goes into 51 0 times with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Fetch the next digit (0) from the dividend, attach it to 51 and continue: 510 / 71

On to step 3:
510 divided by 71 is 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 497 from 510 to get 13.
Take the next digit (2) from the dividend and append it to 13, then repeat: 132 / 71

Going ahead to step 4:
When dividing 132 by 71, we get 1 with a remainder of 61.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
Deduct 71 from 132 and we're left with 61.
Fetch the next digit (8) from the dividend, attach it to 61 and continue: 618 / 71

Moving on to step 5:
When dividing 618 by 71, we get 8 with a remainder of 50.
Record the quotient 8 as the next digit in the result. 
Result so far: 718.0
If we subtract 568 from 618, we get 50.
Take the next digit (4) from the dividend and append it to 50, then repeat: 504 / 71

Going ahead to step 6:
When dividing 504 by 71, we get 7 with a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 7187.0
Subtract 497 from 504 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
If we divide 70 by 71, we get 0 and a remainder of 70.
The next digit of our result is 0. 
Result so far: 7187.0
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
If we divide 700 by 71, we get 9 and a remainder of 61.
The next digit of our result is 9. 
Result so far: 7187.09
Deduct 639 from 700 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 9:
71 goes into 610 8 times with a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 7187.098
The remainder is 42 after subtracting 568 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 10:
71 goes into 420 5 times with a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 7187.0985
If we subtract 355 from 420, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 11:
71 goes into 650 9 times with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 7187.09859
Subtracting 639 from 650 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 12:
110 divided by 71 is 1 with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 7187.098591
The remainder is 39 after subtracting 71 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 13:
The number 71 fits into 390 5 times, leaving a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 7187.0985915
The remainder is 35 after subtracting 355 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 14:
If we divide 350 by 71, we get 4 and a remainder of 66.
The next digit of our result is 4. 
Result so far: 7187.09859154
The remainder is 66 after subtracting 284 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

After the division, we end up with 7187.09859154 and a remainder of 6.6e-08.