We look at the division of 642089 by 71 
The aim is to understand the frequency of 71 in 642089.

Going ahead to step 1:
71 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 71

Moving on to step 2:
The number 71 fits into 64 0 times, leaving a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Fetch the next digit (2) from the dividend, attach it to 64 and continue: 642 / 71

Moving on to step 3:
71 can be fit into 642 9 times, resulting in a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 639 away from 642, we end up with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 71

Moving on to step 4:
If we divide 30 by 71, we get 0 and a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 90.0
If we subtract 0 from 30, we get 30.
Append the next digit (8) from the dividend to 30 and continue with: 308 / 71

Advancing to step 5:
71 goes into 308 4 times with a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 904.0
Subtracting 284 from 308 leaves us with 24.
Take the next digit (9) from the dividend and append it to 24, then repeat: 249 / 71

Going ahead to step 6:
71 can be fit into 249 3 times, resulting in a remainder of 36.
The next digit of our result is 3. 
Result so far: 9043.0
Subtracting 213 from 249 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 7:
71 goes into 360 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 9043.5
If we take 355 away from 360, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
71 can be fit into 50 0 times, resulting in a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 9043.5
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 9:
71 goes into 500 7 times with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 9043.507
If we take 497 away from 500, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 10:
When dividing 30 by 71, we get 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 9043.507
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 11:
300 divided by 71 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 9043.50704
Subtracting 284 from 300 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 12:
71 can be fit into 160 2 times, resulting in a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 9043.507042
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.

Moving on to step 13:
71 can be fit into 180 2 times, resulting in a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 9043.5070422
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.

The final result is 9043.5070422 with a remainder of 3.8e-07.