Let's divide 53643790 by 393
The aim is to understand the frequency of 393 in 53643790.

Moving on to step 1:
When dividing 5 by 393, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 393

On to step 2:
393 goes into 53 0 times with a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Grab the next digit (6) from the dividend, add it to 53, then carry on: 536 / 393

Step 3:
536 divided by 393 is 1 with a remainder of 143.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 143 after subtracting 393 from 536.
Append the next digit (4) from the dividend to 143 and continue with: 1434 / 393

Let's proceed to step 4:
393 goes into 1434 3 times with a remainder of 255.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
The remainder is 255 after subtracting 1179 from 1434.
Include the next digit (3) from the dividend after 255, then repeat: 2553 / 393

Let's proceed to step 5:
393 can be fit into 2553 6 times, resulting in a remainder of 195.
The next digit of our result is 6. 
Result so far: 136.0
Subtract 2358 from 2553 to get 195.
Grab the next digit (7) from the dividend, add it to 195, then carry on: 1957 / 393

Step 6:
If we divide 1957 by 393, we get 4 and a remainder of 385.
Record the quotient 4 as the next digit in the result. 
Result so far: 1364.0
If we take 1572 away from 1957, we end up with 385.
Take the next digit (9) from the dividend and append it to 385, then repeat: 3859 / 393

Moving on to step 7:
If we divide 3859 by 393, we get 9 and a remainder of 322.
Write down 9 as next digit of the result. 
Result so far: 13649.0
Subtract 3537 from 3859 to get 322.
Bring next digit (0) of the dividend behind the 322 and repeat the process: 3220 / 393

On to step 8:
393 goes into 3220 8 times with a remainder of 76.
Write down 8 as next digit of the result. 
Result so far: 136498.0
Deduct 3144 from 3220 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 9:
760 divided by 393 is 1 with a remainder of 367.
Record the quotient 1 as the next digit in the result. 
Result so far: 136498.1
If we subtract 393 from 760, we get 367.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

On to step 10:
The number 393 fits into 3670 9 times, leaving a remainder of 133.
The number 9 becomes the next digit in our result. 
Result so far: 136498.19
Deduct 3537 from 3670 and we're left with 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Let's proceed to step 11:
The number 393 fits into 1330 3 times, leaving a remainder of 151.
Put 3 as the next digit of the answer. 
Result so far: 136498.193
Subtract 1179 from 1330 to get 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Advancing to step 12:
If we divide 1510 by 393, we get 3 and a remainder of 331.
The next digit of our result is 3. 
Result so far: 136498.1933
Subtract 1179 from 1510 to get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Our division results in 136498.1933 with a remaining 0.00331.