We look at the division of 8442513 by 725 
The aim is to understand the frequency of 725 in 8442513.

Let's proceed to step 1:
725 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 725

Advancing to step 2:
84 divided by 725 is 0 with a remainder of 84.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Include the next digit (4) from the dividend after 84, then repeat: 844 / 725

Let's proceed to step 3:
When dividing 844 by 725, we get 1 with a remainder of 119.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 725 from 844 and we're left with 119.
Append the next digit (2) from the dividend to 119 and continue with: 1192 / 725

Going ahead to step 4:
725 can be fit into 1192 1 times, resulting in a remainder of 467.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 467 after subtracting 725 from 1192.
Bring next digit (5) of the dividend behind the 467 and repeat the process: 4675 / 725

Going ahead to step 5:
If we divide 4675 by 725, we get 6 and a remainder of 325.
Record the quotient 6 as the next digit in the result. 
Result so far: 116.0
Subtract 4350 from 4675 to get 325.
Fetch the next digit (1) from the dividend, attach it to 325 and continue: 3251 / 725

On to step 6:
When dividing 3251 by 725, we get 4 with a remainder of 351.
Record the quotient 4 as the next digit in the result. 
Result so far: 1164.0
Deduct 2900 from 3251 and we're left with 351.
Include the next digit (3) from the dividend after 351, then repeat: 3513 / 725

Advancing to step 7:
725 goes into 3513 4 times with a remainder of 613.
Use 4 as the next digit of our solution. 
Result so far: 11644.0
The remainder is 613 after subtracting 2900 from 3513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6130, and continue the process.

Moving on to step 8:
When dividing 6130 by 725, we get 8 with a remainder of 330.
Put 8 as the next digit of the answer. 
Result so far: 11644.8
The remainder is 330 after subtracting 5800 from 6130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Let's proceed to step 9:
The number 725 fits into 3300 4 times, leaving a remainder of 400.
The next digit of our result is 4. 
Result so far: 11644.84
The remainder is 400 after subtracting 2900 from 3300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 10:
If we divide 4000 by 725, we get 5 and a remainder of 375.
The next digit of our result is 5. 
Result so far: 11644.845
The remainder is 375 after subtracting 3625 from 4000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Let's proceed to step 11:
When dividing 3750 by 725, we get 5 with a remainder of 125.
Write down 5 as next digit of the result. 
Result so far: 11644.8455
Subtract 3625 from 3750 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

After the division, we end up with 11644.8455 and a remainder of 0.00125.