We look at the division of 353270 by 53 
The aim is to understand the frequency of 53 in 353270.

On to step 1:
The number 53 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 53

On to step 2:
When dividing 35 by 53, we get 0 with a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Bring next digit (3) of the dividend behind the 35 and repeat the process: 353 / 53

Moving on to step 3:
When dividing 353 by 53, we get 6 with a remainder of 35.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 35 after subtracting 318 from 353.
Include the next digit (2) from the dividend after 35, then repeat: 352 / 53

Moving on to step 4:
The number 53 fits into 352 6 times, leaving a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 66.0
Subtracting 318 from 352 leaves us with 34.
Append the next digit (7) from the dividend to 34 and continue with: 347 / 53

Going ahead to step 5:
53 can be fit into 347 6 times, resulting in a remainder of 29.
Record the quotient 6 as the next digit in the result. 
Result so far: 666.0
Deduct 318 from 347 and we're left with 29.
Append the next digit (0) from the dividend to 29 and continue with: 290 / 53

Step 6:
The number 53 fits into 290 5 times, leaving a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 6665.0
The remainder is 25 after subtracting 265 from 290.
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 7:
53 goes into 250 4 times with a remainder of 38.
Record the quotient 4 as the next digit in the result. 
Result so far: 6665.4
If we take 212 away from 250, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
53 can be fit into 380 7 times, resulting in a remainder of 9.
The next digit of our result is 7. 
Result so far: 6665.47
Subtract 371 from 380 to 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.

On to step 9:
90 divided by 53 is 1 with a remainder of 37.
The number 1 becomes the next digit in our result. 
Result so far: 6665.471
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 10:
When dividing 370 by 53, we get 6 with a remainder of 52.
Write down 6 as next digit of the result. 
Result so far: 6665.4716
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.

Moving on to step 11:
53 goes into 520 9 times with a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 6665.47169
The remainder is 43 after subtracting 477 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 12:
When dividing 430 by 53, we get 8 with a remainder of 6.
The next digit of our result is 8. 
Result so far: 6665.471698
Subtracting 424 from 430 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 13:
The number 53 fits into 60 1 times, leaving a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 6665.4716981
If we take 53 away from 60, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 14:
If we divide 70 by 53, we get 1 and a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 6665.47169811
If we subtract 53 from 70, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Our division results in 6665.47169811 with a remaining 1.7e-08.