18873587 ÷ 613 
The aim is to understand the frequency of 613 in 18873587.

Step 1:
When dividing 1 by 613, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 613

Step 2:
18 divided by 613 is 0 with a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 613

Step 3:
613 goes into 188 0 times with a remainder of 188.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 188, we end up with 188.
Fetch the next digit (7) from the dividend, attach it to 188 and continue: 1887 / 613

Step 4:
If we divide 1887 by 613, we get 3 and a remainder of 48.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 1839 away from 1887, we end up with 48.
Bring next digit (3) of the dividend behind the 48 and repeat the process: 483 / 613

Moving on to step 5:
When dividing 483 by 613, we get 0 with a remainder of 483.
The next digit of our result is 0. 
Result so far: 30.0
The remainder is 483 after subtracting 0 from 483.
Append the next digit (5) from the dividend to 483 and continue with: 4835 / 613

Moving on to step 6:
613 goes into 4835 7 times with a remainder of 544.
Put 7 as the next digit of the answer. 
Result so far: 307.0
If we take 4291 away from 4835, we end up with 544.
Grab the next digit (8) from the dividend, add it to 544, then carry on: 5448 / 613

Let's proceed to step 7:
5448 divided by 613 is 8 with a remainder of 544.
The number 8 becomes the next digit in our result. 
Result so far: 3078.0
Subtracting 4904 from 5448 leaves us with 544.
Take the next digit (7) from the dividend and append it to 544, then repeat: 5447 / 613

Step 8:
If we divide 5447 by 613, we get 8 and a remainder of 543.
Write down 8 as next digit of the result. 
Result so far: 30788.0
The remainder is 543 after subtracting 4904 from 5447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5430, and continue the process.

Moving on to step 9:
If we divide 5430 by 613, we get 8 and a remainder of 526.
Put 8 as the next digit of the answer. 
Result so far: 30788.8
Subtracting 4904 from 5430 leaves us with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Advancing to step 10:
The number 613 fits into 5260 8 times, leaving a remainder of 356.
Put 8 as the next digit of the answer. 
Result so far: 30788.88
If we subtract 4904 from 5260, we get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

The quotient of the division is 30788.88, and the remainder is 0.356.