648555 ÷ 87 
The aim is to understand the frequency of 87 in 648555.

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
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 87

Going ahead to step 2:
87 can be fit into 64 0 times, resulting in a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Grab the next digit (8) from the dividend, add it to 64, then carry on: 648 / 87

Moving on to step 3:
87 goes into 648 7 times with a remainder of 39.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 609 from 648 and we're left with 39.
Grab the next digit (5) from the dividend, add it to 39, then carry on: 395 / 87

Advancing to step 4:
If we divide 395 by 87, we get 4 and a remainder of 47.
Use 4 as the next digit of our solution. 
Result so far: 74.0
If we take 348 away from 395, we end up with 47.
Fetch the next digit (5) from the dividend, attach it to 47 and continue: 475 / 87

Advancing to step 5:
The number 87 fits into 475 5 times, leaving a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 745.0
The remainder is 40 after subtracting 435 from 475.
Grab the next digit (5) from the dividend, add it to 40, then carry on: 405 / 87

Advancing to step 6:
405 divided by 87 is 4 with a remainder of 57.
Write down 4 as next digit of the result. 
Result so far: 7454.0
Deduct 348 from 405 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 7:
570 divided by 87 is 6 with a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 7454.6
Subtracting 522 from 570 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 8:
When dividing 480 by 87, we get 5 with a remainder of 45.
The next digit of our result is 5. 
Result so far: 7454.65
Subtracting 435 from 480 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 9:
450 divided by 87 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 7454.655
Subtract 435 from 450 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The quotient of the division is 7454.655, and the remainder is 0.0015.