We look at the division of 371818 by 71 
The aim is to understand the frequency of 71 in 371818.

Going ahead to step 1:
71 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 71

Step 2:
If we divide 37 by 71, we get 0 and a remainder of 37.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 37, we get 37.
Bring next digit (1) of the dividend behind the 37 and repeat the process: 371 / 71

Step 3:
71 can be fit into 371 5 times, resulting in a remainder of 16.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 355 from 371 and we're left with 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 71

Advancing to step 4:
The number 71 fits into 168 2 times, leaving a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 52.0
Subtract 142 from 168 to get 26.
Fetch the next digit (1) from the dividend, attach it to 26 and continue: 261 / 71

Step 5:
71 can be fit into 261 3 times, resulting in a remainder of 48.
The number 3 becomes the next digit in our result. 
Result so far: 523.0
If we subtract 213 from 261, we get 48.
Take the next digit (8) from the dividend and append it to 48, then repeat: 488 / 71

Advancing to step 6:
The number 71 fits into 488 6 times, leaving a remainder of 62.
Put 6 as the next digit of the answer. 
Result so far: 5236.0
Deduct 426 from 488 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 7:
If we divide 620 by 71, we get 8 and a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 5236.8
Subtract 568 from 620 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 8:
When dividing 520 by 71, we get 7 with a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 5236.87
If we subtract 497 from 520, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 9:
71 goes into 230 3 times with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 5236.873
Subtracting 213 from 230 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 10:
71 can be fit into 170 2 times, resulting in a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 5236.8732
Subtract 142 from 170 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 11:
280 divided by 71 is 3 with a remainder of 67.
Use 3 as the next digit of our solution. 
Result so far: 5236.87323
Deduct 213 from 280 and we're left 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.

Let's proceed to step 12:
71 can be fit into 670 9 times, resulting in a remainder of 31.
The next digit of our result is 9. 
Result so far: 5236.873239
If we take 639 away from 670, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 13:
The number 71 fits into 310 4 times, leaving a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 5236.8732394
If we subtract 284 from 310, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 14:
260 divided by 71 is 3 with a remainder of 47.
The number 3 becomes the next digit in our result. 
Result so far: 5236.87323943
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.

The final outcome is 5236.87323943, with a leftover of 4.7e-08.