We look at the division of 343663 by 53 
The aim is to understand the frequency of 53 in 343663.

Going ahead to step 1:
53 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 53

Advancing to step 2:
If we divide 34 by 53, we get 0 and a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 34 after subtracting 0 from 34.
Include the next digit (3) from the dividend after 34, then repeat: 343 / 53

Step 3:
When dividing 343 by 53, we get 6 with a remainder of 25.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 318 from 343, we get 25.
Take the next digit (6) from the dividend and append it to 25, then repeat: 256 / 53

Step 4:
If we divide 256 by 53, we get 4 and a remainder of 44.
Put 4 as the next digit of the answer. 
Result so far: 64.0
If we take 212 away from 256, we end up with 44.
Take the next digit (6) from the dividend and append it to 44, then repeat: 446 / 53

On to step 5:
446 divided by 53 is 8 with a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 648.0
Deduct 424 from 446 and we're left with 22.
Take the next digit (3) from the dividend and append it to 22, then repeat: 223 / 53

Let's proceed to step 6:
223 divided by 53 is 4 with a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 6484.0
Subtracting 212 from 223 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
If we divide 110 by 53, we get 2 and a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 6484.2
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.

Moving on to step 8:
The number 53 fits into 40 0 times, leaving a remainder of 40.
The next digit of our result is 0. 
Result so far: 6484.2
Subtract 0 from 40 to 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.

Advancing to step 9:
When dividing 400 by 53, we get 7 with a remainder of 29.
Write down 7 as next digit of the result. 
Result so far: 6484.207
Subtracting 371 from 400 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 10:
When dividing 290 by 53, we get 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 6484.2075
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.

On to step 11:
The number 53 fits into 250 4 times, leaving a remainder of 38.
The number 4 becomes the next digit in our result. 
Result so far: 6484.20754
Subtract 212 from 250 to 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.

Going ahead to step 12:
The number 53 fits into 380 7 times, leaving a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 6484.207547
If we subtract 371 from 380, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 13:
90 divided by 53 is 1 with a remainder of 37.
Write down 1 as next digit of the result. 
Result so far: 6484.2075471
If we take 53 away from 90, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 14:
The number 53 fits into 370 6 times, leaving a remainder of 52.
Use 6 as the next digit of our solution. 
Result so far: 6484.20754716
Subtract 318 from 370 to get 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 6484.20754716, with a leftover of 5.2e-08.