We look at the division of 287943 by 71 
The aim is to understand the frequency of 71 in 287943.

Let's proceed to step 1:
2 divided by 71 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 71

Step 2:
The number 71 fits into 28 0 times, leaving a remainder of 28.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 28 after subtracting 0 from 28.
Include the next digit (7) from the dividend after 28, then repeat: 287 / 71

On to step 3:
287 divided by 71 is 4 with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 284 from 287 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 71

Let's proceed to step 4:
71 can be fit into 39 0 times, resulting in a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Subtracting 0 from 39 leaves us with 39.
Append the next digit (4) from the dividend to 39 and continue with: 394 / 71

Step 5:
71 goes into 394 5 times with a remainder of 39.
Put 5 as the next digit of the answer. 
Result so far: 405.0
Subtract 355 from 394 to get 39.
Include the next digit (3) from the dividend after 39, then repeat: 393 / 71

On to step 6:
393 divided by 71 is 5 with a remainder of 38.
Put 5 as the next digit of the answer. 
Result so far: 4055.0
If we subtract 355 from 393, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 7:
71 goes into 380 5 times with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 4055.5
The remainder is 25 after subtracting 355 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 8:
71 goes into 250 3 times with a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 4055.53
If we take 213 away from 250, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 9:
370 divided by 71 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 4055.535
Deduct 355 from 370 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 10:
150 divided by 71 is 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 4055.5352
Deduct 142 from 150 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 11:
80 divided by 71 is 1 with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 4055.53521
Subtracting 71 from 80 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 12:
71 can be fit into 90 1 times, resulting in a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 4055.535211
The remainder is 19 after subtracting 71 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final outcome is 4055.535211, with a leftover of 1.9e-06.