We look at the division of 71493 by 87 
The aim is to understand the frequency of 87 in 71493.

Advancing to step 1:
When dividing 7 by 87, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 87

Step 2:
87 can be fit into 71 0 times, resulting in a remainder of 71.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Fetch the next digit (4) from the dividend, attach it to 71 and continue: 714 / 87

Advancing to step 3:
The number 87 fits into 714 8 times, leaving a remainder of 18.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 18 after subtracting 696 from 714.
Fetch the next digit (9) from the dividend, attach it to 18 and continue: 189 / 87

On to step 4:
87 can be fit into 189 2 times, resulting in a remainder of 15.
The next digit of our result is 2. 
Result so far: 82.0
The remainder is 15 after subtracting 174 from 189.
Append the next digit (3) from the dividend to 15 and continue with: 153 / 87

Step 5:
153 divided by 87 is 1 with a remainder of 66.
Use 1 as the next digit of our solution. 
Result so far: 821.0
Subtracting 87 from 153 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 6:
If we divide 660 by 87, we get 7 and a remainder of 51.
Put 7 as the next digit of the answer. 
Result so far: 821.7
The remainder is 51 after subtracting 609 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 7:
87 can be fit into 510 5 times, resulting in a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 821.75
Subtracting 435 from 510 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 8:
If we divide 750 by 87, we get 8 and a remainder of 54.
Put 8 as the next digit of the answer. 
Result so far: 821.758
If we take 696 away from 750, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 9:
540 divided by 87 is 6 with a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 821.7586
Subtract 522 from 540 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 10:
The number 87 fits into 180 2 times, leaving a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 821.75862
Subtracting 174 from 180 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 11:
87 can be fit into 60 0 times, resulting in a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 821.75862
If we subtract 0 from 60, we get 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 12:
When dividing 600 by 87, we get 6 with a remainder of 78.
Write down 6 as next digit of the result. 
Result so far: 821.7586206
If we take 522 away from 600, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 13:
The number 87 fits into 780 8 times, leaving a remainder of 84.
Use 8 as the next digit of our solution. 
Result so far: 821.75862068
Subtracting 696 from 780 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The final outcome is 821.75862068, with a leftover of 8.4e-08.