We're dividing 137380 by 87 
The aim is to understand the frequency of 87 in 137380.

Advancing to step 1:
87 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 87

Let's proceed to step 2:
The number 87 fits into 13 0 times, leaving a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (7) from the dividend and append it to 13, then repeat: 137 / 87

On to step 3:
87 can be fit into 137 1 times, resulting in a remainder of 50.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 87 away from 137, we end up with 50.
Fetch the next digit (3) from the dividend, attach it to 50 and continue: 503 / 87

Moving on to step 4:
When dividing 503 by 87, we get 5 with a remainder of 68.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtract 435 from 503 to get 68.
Include the next digit (8) from the dividend after 68, then repeat: 688 / 87

Going ahead to step 5:
87 goes into 688 7 times with a remainder of 79.
Put 7 as the next digit of the answer. 
Result so far: 157.0
Deduct 609 from 688 and we're left with 79.
Include the next digit (0) from the dividend after 79, then repeat: 790 / 87

Advancing to step 6:
87 can be fit into 790 9 times, resulting in a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 1579.0
Deduct 783 from 790 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
70 divided by 87 is 0 with a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 1579.0
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
When dividing 700 by 87, we get 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 1579.08
The remainder is 4 after subtracting 696 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
87 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 1579.08
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
The number 87 fits into 400 4 times, leaving a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 1579.0804
Subtract 348 from 400 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 11:
When dividing 520 by 87, we get 5 with a remainder of 85.
Put 5 as the next digit of the answer. 
Result so far: 1579.08045
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.

Step 12:
87 can be fit into 850 9 times, resulting in a remainder of 67.
The number 9 becomes the next digit in our result. 
Result so far: 1579.080459
The remainder is 67 after subtracting 783 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 13:
670 divided by 87 is 7 with a remainder of 61.
Record the quotient 7 as the next digit in the result. 
Result so far: 1579.0804597
If we take 609 away from 670, we end up 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 14:
When dividing 610 by 87, we get 7 with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 1579.08045977
Subtract 609 from 610 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 1579.08045977 and a remainder of 1e-09.