139440 ÷ 87 
The aim is to understand the frequency of 87 in 139440.

Moving on to step 1:
87 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 87

On to step 2:
If we divide 13 by 87, we get 0 and a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 87

Going ahead to step 3:
87 can be fit into 139 1 times, resulting in a remainder of 52.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 87 from 139, we get 52.
Bring next digit (4) of the dividend behind the 52 and repeat the process: 524 / 87

Advancing to step 4:
524 divided by 87 is 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
If we subtract 522 from 524, we get 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 87

Advancing to step 5:
If we divide 24 by 87, we get 0 and a remainder of 24.
The next digit of our result is 0. 
Result so far: 160.0
If we take 0 away from 24, we end up with 24.
Bring next digit (0) of the dividend behind the 24 and repeat the process: 240 / 87

On to step 6:
87 can be fit into 240 2 times, resulting in a remainder of 66.
Put 2 as the next digit of the answer. 
Result so far: 1602.0
Subtract 174 from 240 to get 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 7:
660 divided by 87 is 7 with a remainder of 51.
The number 7 becomes the next digit in our result. 
Result so far: 1602.7
Subtracting 609 from 660 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 8:
87 goes into 510 5 times with a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 1602.75
If we subtract 435 from 510, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 9:
750 divided by 87 is 8 with a remainder of 54.
Record the quotient 8 as the next digit in the result. 
Result so far: 1602.758
If we subtract 696 from 750, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 10:
When dividing 540 by 87, we get 6 with a remainder of 18.
Record the quotient 6 as the next digit in the result. 
Result so far: 1602.7586
Deduct 522 from 540 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 11:
When dividing 180 by 87, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 1602.75862
If we take 174 away from 180, we end up 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.

Step 12:
The number 87 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 1602.75862
If we take 0 away from 60, we end up with 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 13:
When dividing 600 by 87, we get 6 with a remainder of 78.
The number 6 becomes the next digit in our result. 
Result so far: 1602.7586206
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.

Moving on to step 14:
780 divided by 87 is 8 with a remainder of 84.
Put 8 as the next digit of the answer. 
Result so far: 1602.75862068
If we subtract 696 from 780, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Our division results in 1602.75862068 with a remaining 8.4e-08.