We're dividing 15757191 by 225 
The aim is to understand the frequency of 225 in 15757191.

Let's proceed to step 1:
When dividing 1 by 225, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 225

Let's proceed to step 2:
If we divide 15 by 225, we get 0 and a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Append the next digit (7) from the dividend to 15 and continue with: 157 / 225

Step 3:
If we divide 157 by 225, we get 0 and a remainder of 157.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 157 to get 157.
Fetch the next digit (5) from the dividend, attach it to 157 and continue: 1575 / 225

Advancing to step 4:
When dividing 1575 by 225, we get 7 with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 1575 from 1575, we get 0.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 225

Moving on to step 5:
When dividing 7 by 225, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 70.0
Subtract 0 from 7 to get 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 225

Step 6:
71 divided by 225 is 0 with a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 700.0
If we take 0 away from 71, we end up with 71.
Include the next digit (9) from the dividend after 71, then repeat: 719 / 225

Let's proceed to step 7:
The number 225 fits into 719 3 times, leaving a remainder of 44.
The next digit of our result is 3. 
Result so far: 7003.0
If we subtract 675 from 719, we get 44.
Include the next digit (1) from the dividend after 44, then repeat: 441 / 225

Step 8:
If we divide 441 by 225, we get 1 and a remainder of 216.
Record the quotient 1 as the next digit in the result. 
Result so far: 70031.0
Subtract 225 from 441 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 9:
If we divide 2160 by 225, we get 9 and a remainder of 135.
The number 9 becomes the next digit in our result. 
Result so far: 70031.9
If we take 2025 away from 2160, we end up with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Step 10:
225 goes into 1350 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 70031.96
Subtracting 1350 from 1350 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
The number 225 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 70031.96
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
225 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 70031.96
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 70031.96 with a balance of 0.0.