We're dividing 697390 by 87 
The aim is to understand the frequency of 87 in 697390.

Let's proceed to step 1:
6 divided by 87 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 87

On to step 2:
If we divide 69 by 87, we get 0 and a remainder of 69.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 69, we get 69.
Bring next digit (7) of the dividend behind the 69 and repeat the process: 697 / 87

Moving on to step 3:
87 can be fit into 697 8 times, resulting in a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 696 from 697 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 87

Let's proceed to step 4:
87 can be fit into 13 0 times, resulting in a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 80.0
If we subtract 0 from 13, we get 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 87

On to step 5:
87 can be fit into 139 1 times, resulting in a remainder of 52.
Write down 1 as next digit of the result. 
Result so far: 801.0
Subtract 87 from 139 to get 52.
Grab the next digit (0) from the dividend, add it to 52, then carry on: 520 / 87

Let's proceed to step 6:
87 goes into 520 5 times with a remainder of 85.
The next digit of our result is 5. 
Result so far: 8015.0
If we subtract 435 from 520, we get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Advancing to step 7:
87 goes into 850 9 times with a remainder of 67.
The next digit of our result is 9. 
Result so far: 8015.9
If we subtract 783 from 850, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 8:
87 goes into 670 7 times with a remainder of 61.
Put 7 as the next digit of the answer. 
Result so far: 8015.97
Deduct 609 from 670 and we're left 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.

Moving on to step 9:
If we divide 610 by 87, we get 7 and a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 8015.977
The remainder is 1 after subtracting 609 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 8015.977 with a remainder of 0.0001.