We're dividing 28185903 by 725 
The aim is to understand the frequency of 725 in 28185903.

Let's proceed to step 1:
725 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 725

Moving on to step 2:
If we divide 28 by 725, we get 0 and a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 725

Step 3:
The number 725 fits into 281 0 times, leaving a remainder of 281.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 281 leaves us with 281.
Grab the next digit (8) from the dividend, add it to 281, then carry on: 2818 / 725

Advancing to step 4:
The number 725 fits into 2818 3 times, leaving a remainder of 643.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 2175 from 2818 and we're left with 643.
Bring next digit (5) of the dividend behind the 643 and repeat the process: 6435 / 725

Step 5:
6435 divided by 725 is 8 with a remainder of 635.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
If we take 5800 away from 6435, we end up with 635.
Fetch the next digit (9) from the dividend, attach it to 635 and continue: 6359 / 725

Advancing to step 6:
725 goes into 6359 8 times with a remainder of 559.
Use 8 as the next digit of our solution. 
Result so far: 388.0
If we subtract 5800 from 6359, we get 559.
Grab the next digit (0) from the dividend, add it to 559, then carry on: 5590 / 725

Going ahead to step 7:
725 goes into 5590 7 times with a remainder of 515.
The next digit of our result is 7. 
Result so far: 3887.0
Subtract 5075 from 5590 to get 515.
Include the next digit (3) from the dividend after 515, then repeat: 5153 / 725

Advancing to step 8:
The number 725 fits into 5153 7 times, leaving a remainder of 78.
The number 7 becomes the next digit in our result. 
Result so far: 38877.0
Deduct 5075 from 5153 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 9:
If we divide 780 by 725, we get 1 and a remainder of 55.
The next digit of our result is 1. 
Result so far: 38877.1
Subtract 725 from 780 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 10:
If we divide 550 by 725, we get 0 and a remainder of 550.
Use 0 as the next digit of our solution. 
Result so far: 38877.1
Deduct 0 from 550 and we're left with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Advancing to step 11:
725 can be fit into 5500 7 times, resulting in a remainder of 425.
Put 7 as the next digit of the answer. 
Result so far: 38877.107
If we subtract 5075 from 5500, we get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Let's proceed to step 12:
725 goes into 4250 5 times with a remainder of 625.
The number 5 becomes the next digit in our result. 
Result so far: 38877.1075
Subtracting 3625 from 4250 leaves us with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Let's proceed to step 13:
If we divide 6250 by 725, we get 8 and a remainder of 450.
The next digit of our result is 8. 
Result so far: 38877.10758
If we subtract 5800 from 6250, we get 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Let's proceed to step 14:
If we divide 4500 by 725, we get 6 and a remainder of 150.
Use 6 as the next digit of our solution. 
Result so far: 38877.107586
If we take 4350 away from 4500, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 15:
725 goes into 1500 2 times with a remainder of 50.
Put 2 as the next digit of the answer. 
Result so far: 38877.1075862
Subtract 1450 from 1500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 16:
500 divided by 725 is 0 with a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 38877.1075862
Subtract 0 from 500 to get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

The final outcome is 38877.1075862, with a leftover of 5e-07.