15115539 ÷ 602 
The aim is to understand the frequency of 602 in 15115539.

Step 1:
The number 602 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 602

Let's proceed to step 2:
602 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 602

Going ahead to step 3:
The number 602 fits into 151 0 times, leaving a remainder of 151.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 151 and we're left with 151.
Bring next digit (1) of the dividend behind the 151 and repeat the process: 1511 / 602

Moving on to step 4:
The number 602 fits into 1511 2 times, leaving a remainder of 307.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 1204 from 1511, we get 307.
Include the next digit (5) from the dividend after 307, then repeat: 3075 / 602

Going ahead to step 5:
602 can be fit into 3075 5 times, resulting in a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Subtract 3010 from 3075 to get 65.
Take the next digit (5) from the dividend and append it to 65, then repeat: 655 / 602

Step 6:
655 divided by 602 is 1 with a remainder of 53.
Record the quotient 1 as the next digit in the result. 
Result so far: 251.0
Subtract 602 from 655 to get 53.
Fetch the next digit (3) from the dividend, attach it to 53 and continue: 533 / 602

Going ahead to step 7:
If we divide 533 by 602, we get 0 and a remainder of 533.
Record the quotient 0 as the next digit in the result. 
Result so far: 2510.0
Subtracting 0 from 533 leaves us with 533.
Take the next digit (9) from the dividend and append it to 533, then repeat: 5339 / 602

Advancing to step 8:
602 goes into 5339 8 times with a remainder of 523.
Write down 8 as next digit of the result. 
Result so far: 25108.0
If we take 4816 away from 5339, we end up with 523.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5230, and continue the process.

Going ahead to step 9:
602 can be fit into 5230 8 times, resulting in a remainder of 414.
Put 8 as the next digit of the answer. 
Result so far: 25108.8
Subtract 4816 from 5230 to get 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Going ahead to step 10:
602 goes into 4140 6 times with a remainder of 528.
The number 6 becomes the next digit in our result. 
Result so far: 25108.86
If we subtract 3612 from 4140, we get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Moving on to step 11:
The number 602 fits into 5280 8 times, leaving a remainder of 464.
Write down 8 as next digit of the result. 
Result so far: 25108.868
The remainder is 464 after subtracting 4816 from 5280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Let's proceed to step 12:
The number 602 fits into 4640 7 times, leaving a remainder of 426.
Record the quotient 7 as the next digit in the result. 
Result so far: 25108.8687
Deduct 4214 from 4640 and we're left with 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Advancing to step 13:
4260 divided by 602 is 7 with a remainder of 46.
Record the quotient 7 as the next digit in the result. 
Result so far: 25108.86877
Deduct 4214 from 4260 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final outcome is 25108.86877, with a leftover of 4.6e-05.