We look at the division of 1248161 by 71 
The aim is to understand the frequency of 71 in 1248161.

Step 1:
When dividing 1 by 71, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 71

Advancing to step 2:
71 can be fit into 12 0 times, resulting in a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Fetch the next digit (4) from the dividend, attach it to 12 and continue: 124 / 71

Going ahead to step 3:
71 goes into 124 1 times with a remainder of 53.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 71 from 124 and we're left with 53.
Append the next digit (8) from the dividend to 53 and continue with: 538 / 71

Moving on to step 4:
When dividing 538 by 71, we get 7 with a remainder of 41.
The next digit of our result is 7. 
Result so far: 17.0
The remainder is 41 after subtracting 497 from 538.
Append the next digit (1) from the dividend to 41 and continue with: 411 / 71

Step 5:
If we divide 411 by 71, we get 5 and a remainder of 56.
The next digit of our result is 5. 
Result so far: 175.0
Deduct 355 from 411 and we're left with 56.
Bring next digit (6) of the dividend behind the 56 and repeat the process: 566 / 71

On to step 6:
If we divide 566 by 71, we get 7 and a remainder of 69.
Record the quotient 7 as the next digit in the result. 
Result so far: 1757.0
Subtracting 497 from 566 leaves us with 69.
Include the next digit (1) from the dividend after 69, then repeat: 691 / 71

Going ahead to step 7:
71 goes into 691 9 times with a remainder of 52.
Use 9 as the next digit of our solution. 
Result so far: 17579.0
If we subtract 639 from 691, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 8:
71 can be fit into 520 7 times, resulting in a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 17579.7
Subtracting 497 from 520 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 9:
71 can be fit into 230 3 times, resulting in a remainder of 17.
The next digit of our result is 3. 
Result so far: 17579.73
Deduct 213 from 230 and we're left 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.

Going ahead to step 10:
71 goes into 170 2 times with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 17579.732
If we take 142 away from 170, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 11:
When dividing 280 by 71, we get 3 with a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 17579.7323
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.

Going ahead to step 12:
670 divided by 71 is 9 with a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 17579.73239
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.

Going ahead to step 13:
When dividing 310 by 71, we get 4 with a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 17579.732394
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 14:
71 goes into 260 3 times with a remainder of 47.
The next digit of our result is 3. 
Result so far: 17579.7323943
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 15:
71 can be fit into 470 6 times, resulting in a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 17579.73239436
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.

Our division results in 17579.73239436 with a remaining 4.4e-08.