We look at the division of 72596687 by 87 
The aim is to understand the frequency of 87 in 72596687.

On to step 1:
The number 87 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 87

Step 2:
When dividing 72 by 87, we get 0 with a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 72 and we're left with 72.
Bring next digit (5) of the dividend behind the 72 and repeat the process: 725 / 87

Let's proceed to step 3:
When dividing 725 by 87, we get 8 with a remainder of 29.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 696 from 725, we get 29.
Bring next digit (9) of the dividend behind the 29 and repeat the process: 299 / 87

Let's proceed to step 4:
The number 87 fits into 299 3 times, leaving a remainder of 38.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
The remainder is 38 after subtracting 261 from 299.
Include the next digit (6) from the dividend after 38, then repeat: 386 / 87

Moving on to step 5:
The number 87 fits into 386 4 times, leaving a remainder of 38.
Put 4 as the next digit of the answer. 
Result so far: 834.0
Deduct 348 from 386 and we're left with 38.
Bring next digit (6) of the dividend behind the 38 and repeat the process: 386 / 87

Moving on to step 6:
386 divided by 87 is 4 with a remainder of 38.
Put 4 as the next digit of the answer. 
Result so far: 8344.0
Subtract 348 from 386 to get 38.
Append the next digit (8) from the dividend to 38 and continue with: 388 / 87

Going ahead to step 7:
If we divide 388 by 87, we get 4 and a remainder of 40.
The next digit of our result is 4. 
Result so far: 83444.0
Subtracting 348 from 388 leaves us with 40.
Bring next digit (7) of the dividend behind the 40 and repeat the process: 407 / 87

On to step 8:
When dividing 407 by 87, we get 4 with a remainder of 59.
Record the quotient 4 as the next digit in the result. 
Result so far: 834444.0
Deduct 348 from 407 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Advancing to step 9:
When dividing 590 by 87, we get 6 with a remainder of 68.
The number 6 becomes the next digit in our result. 
Result so far: 834444.6
Subtracting 522 from 590 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 10:
87 can be fit into 680 7 times, resulting in a remainder of 71.
Put 7 as the next digit of the answer. 
Result so far: 834444.67
If we subtract 609 from 680, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 11:
87 goes into 710 8 times with a remainder of 14.
Write down 8 as next digit of the result. 
Result so far: 834444.678
Subtract 696 from 710 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 12:
140 divided by 87 is 1 with a remainder of 53.
The next digit of our result is 1. 
Result so far: 834444.6781
The remainder is 53 after subtracting 87 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Advancing to step 13:
If we divide 530 by 87, we get 6 and a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 834444.67816
If we take 522 away from 530, we end up 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.

Going ahead to step 14:
The number 87 fits into 80 0 times, leaving a remainder of 80.
The next digit of our result is 0. 
Result so far: 834444.67816
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 15:
800 divided by 87 is 9 with a remainder of 17.
The next digit of our result is 9. 
Result so far: 834444.6781609
The remainder is 17 after subtracting 783 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 16:
87 goes into 170 1 times with a remainder of 83.
Record the quotient 1 as the next digit in the result. 
Result so far: 834444.67816091
If we subtract 87 from 170, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

The final result is 834444.67816091 with a remainder of 8.3e-08.