We look at the division of 45392615 by 903 
The aim is to understand the frequency of 903 in 45392615.

Let's proceed to step 1:
4 divided by 903 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 903

Advancing to step 2:
The number 903 fits into 45 0 times, leaving a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 45 and we're left with 45.
Grab the next digit (3) from the dividend, add it to 45, then carry on: 453 / 903

Let's proceed to step 3:
903 can be fit into 453 0 times, resulting in a remainder of 453.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 453, we end up with 453.
Include the next digit (9) from the dividend after 453, then repeat: 4539 / 903

Let's proceed to step 4:
When dividing 4539 by 903, we get 5 with a remainder of 24.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 4515 from 4539 leaves us with 24.
Take the next digit (2) from the dividend and append it to 24, then repeat: 242 / 903

Moving on to step 5:
If we divide 242 by 903, we get 0 and a remainder of 242.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
The remainder is 242 after subtracting 0 from 242.
Append the next digit (6) from the dividend to 242 and continue with: 2426 / 903

Going ahead to step 6:
903 can be fit into 2426 2 times, resulting in a remainder of 620.
Record the quotient 2 as the next digit in the result. 
Result so far: 502.0
Subtract 1806 from 2426 to get 620.
Include the next digit (1) from the dividend after 620, then repeat: 6201 / 903

Moving on to step 7:
The number 903 fits into 6201 6 times, leaving a remainder of 783.
The next digit of our result is 6. 
Result so far: 5026.0
If we subtract 5418 from 6201, we get 783.
Take the next digit (5) from the dividend and append it to 783, then repeat: 7835 / 903

On to step 8:
903 can be fit into 7835 8 times, resulting in a remainder of 611.
Write down 8 as next digit of the result. 
Result so far: 50268.0
Deduct 7224 from 7835 and we're left with 611.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6110, and continue the process.

Step 9:
903 can be fit into 6110 6 times, resulting in a remainder of 692.
The next digit of our result is 6. 
Result so far: 50268.6
If we subtract 5418 from 6110, we get 692.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6920, and continue the process.

Moving on to step 10:
6920 divided by 903 is 7 with a remainder of 599.
Record the quotient 7 as the next digit in the result. 
Result so far: 50268.67
Subtract 6321 from 6920 to get 599.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5990, and continue the process.

On to step 11:
If we divide 5990 by 903, we get 6 and a remainder of 572.
The next digit of our result is 6. 
Result so far: 50268.676
The remainder is 572 after subtracting 5418 from 5990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Advancing to step 12:
When dividing 5720 by 903, we get 6 with a remainder of 302.
The number 6 becomes the next digit in our result. 
Result so far: 50268.6766
If we take 5418 away from 5720, we end up with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

The final outcome is 50268.6766, with a leftover of 0.00302.