We look at the division of 154131 by 71 
The aim is to understand the frequency of 71 in 154131.

Moving on to 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
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 71

Going ahead to step 2:
71 goes into 15 0 times with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Include the next digit (4) from the dividend after 15, then repeat: 154 / 71

Going ahead to step 3:
When dividing 154 by 71, we get 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 142 from 154, we get 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 71

On to step 4:
The number 71 fits into 121 1 times, leaving a remainder of 50.
The next digit of our result is 1. 
Result so far: 21.0
If we subtract 71 from 121, we get 50.
Fetch the next digit (3) from the dividend, attach it to 50 and continue: 503 / 71

Step 5:
The number 71 fits into 503 7 times, leaving a remainder of 6.
The next digit of our result is 7. 
Result so far: 217.0
The remainder is 6 after subtracting 497 from 503.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 71

Moving on to step 6:
If we divide 61 by 71, we get 0 and a remainder of 61.
Use 0 as the next digit of our solution. 
Result so far: 2170.0
The remainder is 61 after subtracting 0 from 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 7:
71 can be fit into 610 8 times, resulting in a remainder of 42.
The next digit of our result is 8. 
Result so far: 2170.8
Subtract 568 from 610 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 8:
The number 71 fits into 420 5 times, leaving a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 2170.85
Subtract 355 from 420 to 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.

Advancing to step 9:
If we divide 650 by 71, we get 9 and a remainder of 11.
The next digit of our result is 9. 
Result so far: 2170.859
If we take 639 away from 650, we end up 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.

Going ahead to step 10:
71 can be fit into 110 1 times, resulting in a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 2170.8591
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.

Moving on to step 11:
390 divided by 71 is 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 2170.85915
Subtract 355 from 390 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 12:
The number 71 fits into 350 4 times, leaving a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 2170.859154
If we subtract 284 from 350, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 13:
660 divided by 71 is 9 with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 2170.8591549
If we take 639 away from 660, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 14:
71 goes into 210 2 times with a remainder of 68.
The number 2 becomes the next digit in our result. 
Result so far: 2170.85915492
If we take 142 away from 210, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

The final result is 2170.85915492 with a remainder of 6.8e-08.