We look at the division of 63423828 by 143 
The aim is to understand the frequency of 143 in 63423828.

Step 1:
When dividing 6 by 143, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 143

Going ahead to step 2:
63 divided by 143 is 0 with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 63, we get 63.
Append the next digit (4) from the dividend to 63 and continue with: 634 / 143

Advancing to step 3:
143 goes into 634 4 times with a remainder of 62.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 62 after subtracting 572 from 634.
Include the next digit (2) from the dividend after 62, then repeat: 622 / 143

On to step 4:
When dividing 622 by 143, we get 4 with a remainder of 50.
The next digit of our result is 4. 
Result so far: 44.0
If we take 572 away from 622, we end up with 50.
Include the next digit (3) from the dividend after 50, then repeat: 503 / 143

Let's proceed to step 5:
503 divided by 143 is 3 with a remainder of 74.
The next digit of our result is 3. 
Result so far: 443.0
The remainder is 74 after subtracting 429 from 503.
Grab the next digit (8) from the dividend, add it to 74, then carry on: 748 / 143

Advancing to step 6:
748 divided by 143 is 5 with a remainder of 33.
Record the quotient 5 as the next digit in the result. 
Result so far: 4435.0
If we subtract 715 from 748, we get 33.
Fetch the next digit (2) from the dividend, attach it to 33 and continue: 332 / 143

Moving on to step 7:
The number 143 fits into 332 2 times, leaving a remainder of 46.
Put 2 as the next digit of the answer. 
Result so far: 44352.0
The remainder is 46 after subtracting 286 from 332.
Bring next digit (8) of the dividend behind the 46 and repeat the process: 468 / 143

Going ahead to step 8:
The number 143 fits into 468 3 times, leaving a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 443523.0
Subtract 429 from 468 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 9:
143 can be fit into 390 2 times, resulting in a remainder of 104.
The next digit of our result is 2. 
Result so far: 443523.2
If we take 286 away from 390, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 10:
The number 143 fits into 1040 7 times, leaving a remainder of 39.
Use 7 as the next digit of our solution. 
Result so far: 443523.27
The remainder is 39 after subtracting 1001 from 1040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 11:
The number 143 fits into 390 2 times, leaving a remainder of 104.
Use 2 as the next digit of our solution. 
Result so far: 443523.272
If we take 286 away from 390, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

On to step 12:
143 goes into 1040 7 times with a remainder of 39.
Put 7 as the next digit of the answer. 
Result so far: 443523.2727
Subtracting 1001 from 1040 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 13:
143 can be fit into 390 2 times, resulting in a remainder of 104.
Record the quotient 2 as the next digit in the result. 
Result so far: 443523.27272
If we subtract 286 from 390, we get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Step 14:
If we divide 1040 by 143, we get 7 and a remainder of 39.
The number 7 becomes the next digit in our result. 
Result so far: 443523.272727
If we take 1001 away from 1040, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 15:
143 goes into 390 2 times with a remainder of 104.
Put 2 as the next digit of the answer. 
Result so far: 443523.2727272
Deduct 286 from 390 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 16:
The number 143 fits into 1040 7 times, leaving a remainder of 39.
The next digit of our result is 7. 
Result so far: 443523.27272727
If we take 1001 away from 1040, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Our division results in 443523.27272727 with a remaining 3.9e-08.