We look at the division of 1443126 by 723 
The aim is to understand the frequency of 723 in 1443126.

Step 1:
The number 723 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 723

Let's proceed to step 2:
723 goes into 14 0 times with a remainder of 14.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 14 after subtracting 0 from 14.
Bring next digit (4) of the dividend behind the 14 and repeat the process: 144 / 723

Moving on to step 3:
723 goes into 144 0 times with a remainder of 144.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 144 to get 144.
Include the next digit (3) from the dividend after 144, then repeat: 1443 / 723

Let's proceed to step 4:
The number 723 fits into 1443 1 times, leaving a remainder of 720.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 723 from 1443 to get 720.
Fetch the next digit (1) from the dividend, attach it to 720 and continue: 7201 / 723

Moving on to step 5:
7201 divided by 723 is 9 with a remainder of 694.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 6507 from 7201 to get 694.
Bring next digit (2) of the dividend behind the 694 and repeat the process: 6942 / 723

Step 6:
The number 723 fits into 6942 9 times, leaving a remainder of 435.
Write down 9 as next digit of the result. 
Result so far: 199.0
Subtract 6507 from 6942 to get 435.
Grab the next digit (6) from the dividend, add it to 435, then carry on: 4356 / 723

On to step 7:
The number 723 fits into 4356 6 times, leaving a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 1996.0
Subtract 4338 from 4356 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 8:
The number 723 fits into 180 0 times, leaving a remainder of 180.
Put 0 as the next digit of the answer. 
Result so far: 1996.0
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 9:
723 can be fit into 1800 2 times, resulting in a remainder of 354.
Record the quotient 2 as the next digit in the result. 
Result so far: 1996.02
Deduct 1446 from 1800 and we're left with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Advancing to step 10:
If we divide 3540 by 723, we get 4 and a remainder of 648.
The next digit of our result is 4. 
Result so far: 1996.024
The remainder is 648 after subtracting 2892 from 3540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Going ahead to step 11:
The number 723 fits into 6480 8 times, leaving a remainder of 696.
Write down 8 as next digit of the result. 
Result so far: 1996.0248
If we take 5784 away from 6480, we end up with 696.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6960, and continue the process.

Advancing to step 12:
If we divide 6960 by 723, we get 9 and a remainder of 453.
Record the quotient 9 as the next digit in the result. 
Result so far: 1996.02489
Deduct 6507 from 6960 and we're left with 453.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4530, and continue the process.

Let's proceed to step 13:
723 goes into 4530 6 times with a remainder of 192.
Use 6 as the next digit of our solution. 
Result so far: 1996.024896
If we take 4338 away from 4530, we end up with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Step 14:
When dividing 1920 by 723, we get 2 with a remainder of 474.
Write down 2 as next digit of the result. 
Result so far: 1996.0248962
Subtract 1446 from 1920 to get 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Advancing to step 15:
723 can be fit into 4740 6 times, resulting in a remainder of 402.
Use 6 as the next digit of our solution. 
Result so far: 1996.02489626
Subtracting 4338 from 4740 leaves us with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

The final outcome is 1996.02489626, with a leftover of 4.02e-07.