We look at the division of 5553046 by 303 
The aim is to understand the frequency of 303 in 5553046.

Advancing to step 1:
303 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 303

On to step 2:
The number 303 fits into 55 0 times, leaving a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Take the next digit (5) from the dividend and append it to 55, then repeat: 555 / 303

Advancing to step 3:
The number 303 fits into 555 1 times, leaving a remainder of 252.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 303 from 555 and we're left with 252.
Grab the next digit (3) from the dividend, add it to 252, then carry on: 2523 / 303

On to step 4:
2523 divided by 303 is 8 with a remainder of 99.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Subtracting 2424 from 2523 leaves us with 99.
Fetch the next digit (0) from the dividend, attach it to 99 and continue: 990 / 303

Moving on to step 5:
303 can be fit into 990 3 times, resulting in a remainder of 81.
The next digit of our result is 3. 
Result so far: 183.0
If we take 909 away from 990, we end up with 81.
Fetch the next digit (4) from the dividend, attach it to 81 and continue: 814 / 303

Step 6:
When dividing 814 by 303, we get 2 with a remainder of 208.
Record the quotient 2 as the next digit in the result. 
Result so far: 1832.0
If we take 606 away from 814, we end up with 208.
Include the next digit (6) from the dividend after 208, then repeat: 2086 / 303

Advancing to step 7:
The number 303 fits into 2086 6 times, leaving a remainder of 268.
Record the quotient 6 as the next digit in the result. 
Result so far: 18326.0
Deduct 1818 from 2086 and we're left with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

On to step 8:
2680 divided by 303 is 8 with a remainder of 256.
Use 8 as the next digit of our solution. 
Result so far: 18326.8
The remainder is 256 after subtracting 2424 from 2680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Let's proceed to step 9:
2560 divided by 303 is 8 with a remainder of 136.
Record the quotient 8 as the next digit in the result. 
Result so far: 18326.88
Subtracting 2424 from 2560 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

The quotient of the division is 18326.88, and the remainder is 0.136.