We look at the division of 80876235 by 71 
The aim is to understand the frequency of 71 in 80876235.

Step 1:
8 divided by 71 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 71

On to step 2:
If we divide 80 by 71, we get 1 and a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 71 from 80 leaves us with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 71

Let's proceed to step 3:
If we divide 98 by 71, we get 1 and a remainder of 27.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Deduct 71 from 98 and we're left with 27.
Append the next digit (7) from the dividend to 27 and continue with: 277 / 71

Going ahead to step 4:
71 can be fit into 277 3 times, resulting in a remainder of 64.
Put 3 as the next digit of the answer. 
Result so far: 113.0
Subtracting 213 from 277 leaves us with 64.
Grab the next digit (6) from the dividend, add it to 64, then carry on: 646 / 71

Step 5:
71 goes into 646 9 times with a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 1139.0
Subtract 639 from 646 to get 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 71

Going ahead to step 6:
When dividing 72 by 71, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 11391.0
If we subtract 71 from 72, we get 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 71

Step 7:
If we divide 13 by 71, we get 0 and a remainder of 13.
The next digit of our result is 0. 
Result so far: 113910.0
Subtracting 0 from 13 leaves us with 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 71

Going ahead to step 8:
135 divided by 71 is 1 with a remainder of 64.
Record the quotient 1 as the next digit in the result. 
Result so far: 1139101.0
Subtract 71 from 135 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 9:
If we divide 640 by 71, we get 9 and a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 1139101.9
Deduct 639 from 640 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 10:
71 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 1139101.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
71 can be fit into 100 1 times, resulting in a remainder of 29.
The next digit of our result is 1. 
Result so far: 1139101.901
Subtract 71 from 100 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 12:
When dividing 290 by 71, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 1139101.9014
The remainder is 6 after subtracting 284 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 13:
71 goes into 60 0 times with a remainder of 60.
The next digit of our result is 0. 
Result so far: 1139101.9014
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 14:
71 goes into 600 8 times with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 1139101.901408
If we take 568 away from 600, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 15:
320 divided by 71 is 4 with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 1139101.9014084
The remainder is 36 after subtracting 284 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 16:
360 divided by 71 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 1139101.90140845
If we subtract 355 from 360, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 1139101.90140845 and a remainder of 5e-09.