584413 ÷ 87 
The aim is to understand the frequency of 87 in 584413.

On to step 1:
When dividing 5 by 87, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 87

Going ahead to step 2:
The number 87 fits into 58 0 times, leaving a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 58, we get 58.
Include the next digit (4) from the dividend after 58, then repeat: 584 / 87

Let's proceed to step 3:
If we divide 584 by 87, we get 6 and a remainder of 62.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 62 after subtracting 522 from 584.
Bring next digit (4) of the dividend behind the 62 and repeat the process: 624 / 87

On to step 4:
87 goes into 624 7 times with a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 67.0
If we subtract 609 from 624, we get 15.
Grab the next digit (1) from the dividend, add it to 15, then carry on: 151 / 87

On to step 5:
151 divided by 87 is 1 with a remainder of 64.
Record the quotient 1 as the next digit in the result. 
Result so far: 671.0
Subtract 87 from 151 to get 64.
Grab the next digit (3) from the dividend, add it to 64, then carry on: 643 / 87

Going ahead to step 6:
The number 87 fits into 643 7 times, leaving a remainder of 34.
Use 7 as the next digit of our solution. 
Result so far: 6717.0
The remainder is 34 after subtracting 609 from 643.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 7:
When dividing 340 by 87, we get 3 with a remainder of 79.
The number 3 becomes the next digit in our result. 
Result so far: 6717.3
The remainder is 79 after subtracting 261 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 8:
If we divide 790 by 87, we get 9 and a remainder of 7.
The next digit of our result is 9. 
Result so far: 6717.39
If we subtract 783 from 790, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
70 divided by 87 is 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 6717.39
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 10:
If we divide 700 by 87, we get 8 and a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 6717.3908
Deduct 696 from 700 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
87 can be fit into 40 0 times, resulting in a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 6717.3908
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
If we divide 400 by 87, we get 4 and a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 6717.390804
Subtracting 348 from 400 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 13:
When dividing 520 by 87, we get 5 with a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 6717.3908045
If we take 435 away from 520, we end up with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 14:
The number 87 fits into 850 9 times, leaving a remainder of 67.
Use 9 as the next digit of our solution. 
Result so far: 6717.39080459
Subtracting 783 from 850 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

The final result is 6717.39080459 with a remainder of 6.7e-08.