We look at the division of 390844 by 71 
The aim is to understand the frequency of 71 in 390844.

Advancing to step 1:
71 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 71

Going ahead to step 2:
When dividing 39 by 71, we get 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Include the next digit (0) from the dividend after 39, then repeat: 390 / 71

On to step 3:
If we divide 390 by 71, we get 5 and a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 355 from 390 leaves us with 35.
Append the next digit (8) from the dividend to 35 and continue with: 358 / 71

Moving on to step 4:
71 goes into 358 5 times with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we take 355 away from 358, we end up with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 71

On to step 5:
34 divided by 71 is 0 with a remainder of 34.
Use 0 as the next digit of our solution. 
Result so far: 550.0
Deduct 0 from 34 and we're left with 34.
Append the next digit (4) from the dividend to 34 and continue with: 344 / 71

Let's proceed to step 6:
The number 71 fits into 344 4 times, leaving a remainder of 60.
Use 4 as the next digit of our solution. 
Result so far: 5504.0
Subtracting 284 from 344 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 7:
71 can be fit into 600 8 times, resulting in a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 5504.8
Subtract 568 from 600 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 8:
The number 71 fits into 320 4 times, leaving a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 5504.84
If we take 284 away from 320, we end up 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.

Going ahead to step 9:
71 can be fit into 360 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 5504.845
Subtract 355 from 360 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 10:
50 divided by 71 is 0 with a remainder of 50.
The next digit of our result is 0. 
Result so far: 5504.845
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 11:
71 goes into 500 7 times with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 5504.84507
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 12:
71 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 5504.84507
Deduct 0 from 30 and we're left 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.

Advancing to step 13:
300 divided by 71 is 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 5504.8450704
Deduct 284 from 300 and we're left 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.

Going ahead to step 14:
71 can be fit into 160 2 times, resulting in a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 5504.84507042
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.

The final outcome is 5504.84507042, with a leftover of 1.8e-08.