We look at the division of 356158 by 71 
The aim is to understand the frequency of 71 in 356158.

Advancing to step 1:
The number 71 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 71

Going ahead to step 2:
71 goes into 35 0 times with a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Take the next digit (6) from the dividend and append it to 35, then repeat: 356 / 71

Step 3:
The number 71 fits into 356 5 times, leaving a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 355 from 356 to get 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 71

On to step 4:
71 can be fit into 11 0 times, resulting in a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 50.0
Deduct 0 from 11 and we're left with 11.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 71

Going ahead to step 5:
When dividing 115 by 71, we get 1 with a remainder of 44.
The next digit of our result is 1. 
Result so far: 501.0
If we take 71 away from 115, we end up with 44.
Append the next digit (8) from the dividend to 44 and continue with: 448 / 71

Moving on to step 6:
The number 71 fits into 448 6 times, leaving a remainder of 22.
Write down 6 as next digit of the result. 
Result so far: 5016.0
If we take 426 away from 448, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 7:
When dividing 220 by 71, we get 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 5016.3
Deduct 213 from 220 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 8:
If we divide 70 by 71, we get 0 and a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 5016.3
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 9:
71 goes into 700 9 times with a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 5016.309
If we take 639 away from 700, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 10:
71 goes into 610 8 times with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 5016.3098
Subtracting 568 from 610 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 11:
71 goes into 420 5 times with a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 5016.30985
Subtract 355 from 420 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 12:
If we divide 650 by 71, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 5016.309859
Deduct 639 from 650 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 13:
110 divided by 71 is 1 with a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 5016.3098591
The remainder is 39 after subtracting 71 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 14:
The number 71 fits into 390 5 times, leaving a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 5016.30985915
If we take 355 away from 390, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final outcome is 5016.30985915, with a leftover of 3.5e-08.