We look at the division of 850667 by 71 
The aim is to understand the frequency of 71 in 850667.

Step 1:
The number 71 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 71

Advancing to step 2:
71 goes into 85 1 times with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 71 from 85 to get 14.
Include the next digit (0) from the dividend after 14, then repeat: 140 / 71

On to step 3:
When dividing 140 by 71, we get 1 with a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtract 71 from 140 to get 69.
Include the next digit (6) from the dividend after 69, then repeat: 696 / 71

On to step 4:
696 divided by 71 is 9 with a remainder of 57.
The next digit of our result is 9. 
Result so far: 119.0
Deduct 639 from 696 and we're left with 57.
Fetch the next digit (6) from the dividend, attach it to 57 and continue: 576 / 71

Advancing to step 5:
576 divided by 71 is 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 1198.0
If we take 568 away from 576, we end up with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 71

Moving on to step 6:
71 goes into 87 1 times with a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 11981.0
The remainder is 16 after subtracting 71 from 87.
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 7:
The number 71 fits into 160 2 times, leaving a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 11981.2
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.

On to step 8:
71 goes into 180 2 times with a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 11981.22
If we take 142 away from 180, we end up 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.

The final outcome is 11981.22, with a leftover of 0.038.