We look at the division of 145806 by 53 
The aim is to understand the frequency of 53 in 145806.

On to step 1:
1 divided by 53 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 53

Advancing to step 2:
14 divided by 53 is 0 with a remainder of 14.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 14 to get 14.
Include the next digit (5) from the dividend after 14, then repeat: 145 / 53

On to step 3:
The number 53 fits into 145 2 times, leaving a remainder of 39.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 106 from 145 and we're left with 39.
Bring next digit (8) of the dividend behind the 39 and repeat the process: 398 / 53

Step 4:
53 goes into 398 7 times with a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 27.0
Subtracting 371 from 398 leaves us with 27.
Bring next digit (0) of the dividend behind the 27 and repeat the process: 270 / 53

Let's proceed to step 5:
53 goes into 270 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 275.0
Deduct 265 from 270 and we're left with 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 53

Going ahead to step 6:
56 divided by 53 is 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 2751.0
If we subtract 53 from 56, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
30 divided by 53 is 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 2751.0
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
53 can be fit into 300 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 2751.05
The remainder is 35 after subtracting 265 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 9:
If we divide 350 by 53, we get 6 and a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 2751.056
Subtract 318 from 350 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 10:
53 can be fit into 320 6 times, resulting in a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 2751.0566
Subtracting 318 from 320 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 2751.0566 with a remainder of 2e-05.