We look at the division of 15643094 by 393 
The aim is to understand the frequency of 393 in 15643094.

Moving on to step 1:
1 divided by 393 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 393

Going ahead to step 2:
When dividing 15 by 393, we get 0 with a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Fetch the next digit (6) from the dividend, attach it to 15 and continue: 156 / 393

Let's proceed to step 3:
156 divided by 393 is 0 with a remainder of 156.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 156, we end up with 156.
Bring next digit (4) of the dividend behind the 156 and repeat the process: 1564 / 393

Let's proceed to step 4:
When dividing 1564 by 393, we get 3 with a remainder of 385.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 1179 from 1564, we get 385.
Fetch the next digit (3) from the dividend, attach it to 385 and continue: 3853 / 393

On to step 5:
The number 393 fits into 3853 9 times, leaving a remainder of 316.
The next digit of our result is 9. 
Result so far: 39.0
The remainder is 316 after subtracting 3537 from 3853.
Include the next digit (0) from the dividend after 316, then repeat: 3160 / 393

On to step 6:
393 can be fit into 3160 8 times, resulting in a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 398.0
Subtract 3144 from 3160 to get 16.
Include the next digit (9) from the dividend after 16, then repeat: 169 / 393

On to step 7:
When dividing 169 by 393, we get 0 with a remainder of 169.
Use 0 as the next digit of our solution. 
Result so far: 3980.0
Subtracting 0 from 169 leaves us with 169.
Append the next digit (4) from the dividend to 169 and continue with: 1694 / 393

Going ahead to step 8:
If we divide 1694 by 393, we get 4 and a remainder of 122.
Put 4 as the next digit of the answer. 
Result so far: 39804.0
Subtracting 1572 from 1694 leaves us with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Going ahead to step 9:
1220 divided by 393 is 3 with a remainder of 41.
Record the quotient 3 as the next digit in the result. 
Result so far: 39804.3
Deduct 1179 from 1220 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 10:
When dividing 410 by 393, we get 1 with a remainder of 17.
The next digit of our result is 1. 
Result so far: 39804.31
If we take 393 away from 410, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 11:
When dividing 170 by 393, we get 0 with a remainder of 170.
Put 0 as the next digit of the answer. 
Result so far: 39804.31
If we take 0 away from 170, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 12:
393 goes into 1700 4 times with a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 39804.3104
Subtract 1572 from 1700 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 13:
393 can be fit into 1280 3 times, resulting in a remainder of 101.
Use 3 as the next digit of our solution. 
Result so far: 39804.31043
The remainder is 101 after subtracting 1179 from 1280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Going ahead to step 14:
393 goes into 1010 2 times with a remainder of 224.
The next digit of our result is 2. 
Result so far: 39804.310432
The remainder is 224 after subtracting 786 from 1010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Going ahead to step 15:
393 can be fit into 2240 5 times, resulting in a remainder of 275.
Use 5 as the next digit of our solution. 
Result so far: 39804.3104325
The remainder is 275 after subtracting 1965 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 16:
The number 393 fits into 2750 6 times, leaving a remainder of 392.
Record the quotient 6 as the next digit in the result. 
Result so far: 39804.31043256
Subtracting 2358 from 2750 leaves us with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Our division results in 39804.31043256 with a remaining 3.92e-07.