We look at the division of 291471 by 71 
The aim is to understand the frequency of 71 in 291471.

Step 1:
The number 71 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 71

Let's proceed to step 2:
When dividing 29 by 71, we get 0 with a remainder of 29.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 29, we get 29.
Bring next digit (1) of the dividend behind the 29 and repeat the process: 291 / 71

On to step 3:
71 can be fit into 291 4 times, resulting in a remainder of 7.
The next digit of our result is 4. 
Result so far: 4.0
If we take 284 away from 291, we end up with 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 71

Going ahead to step 4:
When dividing 74 by 71, we get 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 41.0
If we subtract 71 from 74, we get 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 71

On to step 5:
If we divide 37 by 71, we get 0 and a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 410.0
If we subtract 0 from 37, we get 37.
Append the next digit (1) from the dividend to 37 and continue with: 371 / 71

Let's proceed to step 6:
The number 71 fits into 371 5 times, leaving a remainder of 16.
Put 5 as the next digit of the answer. 
Result so far: 4105.0
The remainder is 16 after subtracting 355 from 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 7:
160 divided by 71 is 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 4105.2
Subtract 142 from 160 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 8:
If we divide 180 by 71, we get 2 and a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 4105.22
Deduct 142 from 180 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Our division results in 4105.22 with a remaining 0.038.