303065 divided by 53 
The aim is to understand the frequency of 53 in 303065.

On to step 1:
The number 53 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 53

Going ahead to step 2:
The number 53 fits into 30 0 times, leaving a remainder of 30.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Fetch the next digit (3) from the dividend, attach it to 30 and continue: 303 / 53

Let's proceed to step 3:
The number 53 fits into 303 5 times, leaving a remainder of 38.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 265 from 303 leaves us with 38.
Bring next digit (0) of the dividend behind the 38 and repeat the process: 380 / 53

Step 4:
53 can be fit into 380 7 times, resulting in a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 57.0
If we subtract 371 from 380, we get 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 53

On to step 5:
When dividing 96 by 53, we get 1 with a remainder of 43.
Put 1 as the next digit of the answer. 
Result so far: 571.0
If we subtract 53 from 96, we get 43.
Fetch the next digit (5) from the dividend, attach it to 43 and continue: 435 / 53

Advancing to step 6:
If we divide 435 by 53, we get 8 and a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 5718.0
Subtract 424 from 435 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
110 divided by 53 is 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 5718.2
Subtracting 106 from 110 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
53 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 5718.2
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 9:
53 goes into 400 7 times with a remainder of 29.
The next digit of our result is 7. 
Result so far: 5718.207
If we subtract 371 from 400, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 10:
The number 53 fits into 290 5 times, leaving a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 5718.2075
Subtracting 265 from 290 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 11:
250 divided by 53 is 4 with a remainder of 38.
Use 4 as the next digit of our solution. 
Result so far: 5718.20754
If we subtract 212 from 250, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 12:
53 goes into 380 7 times with a remainder of 9.
The next digit of our result is 7. 
Result so far: 5718.207547
The remainder is 9 after subtracting 371 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 13:
The number 53 fits into 90 1 times, leaving a remainder of 37.
The number 1 becomes the next digit in our result. 
Result so far: 5718.2075471
Subtract 53 from 90 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 14:
When dividing 370 by 53, we get 6 with a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 5718.20754716
Subtracting 318 from 370 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 5718.20754716, with a leftover of 5.2e-08.