We look at the division of 648544 by 71 
The aim is to understand the frequency of 71 in 648544.

On to step 1:
When dividing 6 by 71, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
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

Going ahead to step 2:
64 divided by 71 is 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Bring next digit (8) of the dividend behind the 64 and repeat the process: 648 / 71

On to step 3:
71 goes into 648 9 times with a remainder of 9.
The next digit of our result is 9. 
Result so far: 9.0
If we take 639 away from 648, we end up with 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 71

Going ahead to step 4:
If we divide 95 by 71, we get 1 and a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 91.0
The remainder is 24 after subtracting 71 from 95.
Take the next digit (4) from the dividend and append it to 24, then repeat: 244 / 71

Step 5:
71 can be fit into 244 3 times, resulting in a remainder of 31.
Write down 3 as next digit of the result. 
Result so far: 913.0
Subtract 213 from 244 to get 31.
Include the next digit (4) from the dividend after 31, then repeat: 314 / 71

Let's proceed to step 6:
71 can be fit into 314 4 times, resulting in a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 9134.0
Subtracting 284 from 314 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 7:
When dividing 300 by 71, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 9134.4
The remainder is 16 after subtracting 284 from 300.
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 8:
71 goes into 160 2 times with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 9134.42
The remainder is 18 after subtracting 142 from 160.
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 9:
The number 71 fits into 180 2 times, leaving a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 9134.422
Subtracting 142 from 180 leaves us 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.

After the division, we end up with 9134.422 and a remainder of 0.0038.