We look at the division of 535549 by 71 
The aim is to understand the frequency of 71 in 535549.

Let's proceed to step 1:
The number 71 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 71

Advancing to step 2:
71 goes into 53 0 times with a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 53 after subtracting 0 from 53.
Bring next digit (5) of the dividend behind the 53 and repeat the process: 535 / 71

Let's proceed to step 3:
If we divide 535 by 71, we get 7 and a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 497 from 535 leaves us with 38.
Take the next digit (5) from the dividend and append it to 38, then repeat: 385 / 71

Advancing to step 4:
71 goes into 385 5 times with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 75.0
If we take 355 away from 385, we end up with 30.
Take the next digit (4) from the dividend and append it to 30, then repeat: 304 / 71

On to step 5:
If we divide 304 by 71, we get 4 and a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 754.0
Deduct 284 from 304 and we're left with 20.
Take the next digit (9) from the dividend and append it to 20, then repeat: 209 / 71

Moving on to step 6:
71 goes into 209 2 times with a remainder of 67.
The next digit of our result is 2. 
Result so far: 7542.0
If we take 142 away from 209, 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.

On to step 7:
71 can be fit into 670 9 times, resulting in a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 7542.9
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.

On to step 8:
310 divided by 71 is 4 with a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 7542.94
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.

Step 9:
If we divide 260 by 71, we get 3 and a remainder of 47.
Write down 3 as next digit of the result. 
Result so far: 7542.943
If we take 213 away from 260, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 10:
If we divide 470 by 71, we get 6 and a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 7542.9436
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.

On to step 11:
71 can be fit into 440 6 times, resulting in a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 7542.94366
Subtracting 426 from 440 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 7542.94366 with a remainder of 1.4e-05.