Let's divide 25498254 by 513
The aim is to understand the frequency of 513 in 25498254.

Step 1:
When dividing 2 by 513, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 513

Going ahead to step 2:
When dividing 25 by 513, we get 0 with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Fetch the next digit (4) from the dividend, attach it to 25 and continue: 254 / 513

Advancing to step 3:
513 can be fit into 254 0 times, resulting in a remainder of 254.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 254 leaves us with 254.
Take the next digit (9) from the dividend and append it to 254, then repeat: 2549 / 513

Step 4:
If we divide 2549 by 513, we get 4 and a remainder of 497.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 497 after subtracting 2052 from 2549.
Take the next digit (8) from the dividend and append it to 497, then repeat: 4978 / 513

Step 5:
When dividing 4978 by 513, we get 9 with a remainder of 361.
Use 9 as the next digit of our solution. 
Result so far: 49.0
If we take 4617 away from 4978, we end up with 361.
Include the next digit (2) from the dividend after 361, then repeat: 3612 / 513

Advancing to step 6:
513 can be fit into 3612 7 times, resulting in a remainder of 21.
The next digit of our result is 7. 
Result so far: 497.0
If we subtract 3591 from 3612, we get 21.
Take the next digit (5) from the dividend and append it to 21, then repeat: 215 / 513

Moving on to step 7:
When dividing 215 by 513, we get 0 with a remainder of 215.
Use 0 as the next digit of our solution. 
Result so far: 4970.0
The remainder is 215 after subtracting 0 from 215.
Fetch the next digit (4) from the dividend, attach it to 215 and continue: 2154 / 513

Going ahead to step 8:
2154 divided by 513 is 4 with a remainder of 102.
Write down 4 as next digit of the result. 
Result so far: 49704.0
If we subtract 2052 from 2154, we get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 9:
513 can be fit into 1020 1 times, resulting in a remainder of 507.
Put 1 as the next digit of the answer. 
Result so far: 49704.1
Deduct 513 from 1020 and we're left with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Step 10:
When dividing 5070 by 513, we get 9 with a remainder of 453.
The next digit of our result is 9. 
Result so far: 49704.19
Subtracting 4617 from 5070 leaves us with 453.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4530, and continue the process.

Advancing to step 11:
513 can be fit into 4530 8 times, resulting in a remainder of 426.
The next digit of our result is 8. 
Result so far: 49704.198
The remainder is 426 after subtracting 4104 from 4530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Let's proceed to step 12:
513 can be fit into 4260 8 times, resulting in a remainder of 156.
The number 8 becomes the next digit in our result. 
Result so far: 49704.1988
Deduct 4104 from 4260 and we're left with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

After the division, we end up with 49704.1988 and a remainder of 0.00156.