We look at the division of 28990555 by 723 
The aim is to understand the frequency of 723 in 28990555.

On to step 1:
If we divide 2 by 723, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 723

Moving on to step 2:
723 can be fit into 28 0 times, resulting in a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Fetch the next digit (9) from the dividend, attach it to 28 and continue: 289 / 723

Let's proceed to step 3:
When dividing 289 by 723, we get 0 with a remainder of 289.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 289, we end up with 289.
Bring next digit (9) of the dividend behind the 289 and repeat the process: 2899 / 723

Advancing to step 4:
2899 divided by 723 is 4 with a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 2892 from 2899 and we're left with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 723

Going ahead to step 5:
The number 723 fits into 70 0 times, leaving a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 40.0
If we take 0 away from 70, we end up with 70.
Bring next digit (5) of the dividend behind the 70 and repeat the process: 705 / 723

Moving on to step 6:
When dividing 705 by 723, we get 0 with a remainder of 705.
The number 0 becomes the next digit in our result. 
Result so far: 400.0
The remainder is 705 after subtracting 0 from 705.
Include the next digit (5) from the dividend after 705, then repeat: 7055 / 723

Step 7:
723 goes into 7055 9 times with a remainder of 548.
The number 9 becomes the next digit in our result. 
Result so far: 4009.0
Deduct 6507 from 7055 and we're left with 548.
Fetch the next digit (5) from the dividend, attach it to 548 and continue: 5485 / 723

Advancing to step 8:
723 goes into 5485 7 times with a remainder of 424.
Record the quotient 7 as the next digit in the result. 
Result so far: 40097.0
Subtracting 5061 from 5485 leaves us with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Step 9:
723 goes into 4240 5 times with a remainder of 625.
Record the quotient 5 as the next digit in the result. 
Result so far: 40097.5
If we subtract 3615 from 4240, we get 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

On to step 10:
6250 divided by 723 is 8 with a remainder of 466.
The next digit of our result is 8. 
Result so far: 40097.58
If we subtract 5784 from 6250, we get 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

Advancing to step 11:
When dividing 4660 by 723, we get 6 with a remainder of 322.
Put 6 as the next digit of the answer. 
Result so far: 40097.586
If we subtract 4338 from 4660, we get 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

On to step 12:
If we divide 3220 by 723, we get 4 and a remainder of 328.
Record the quotient 4 as the next digit in the result. 
Result so far: 40097.5864
Subtract 2892 from 3220 to get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Moving on to step 13:
723 can be fit into 3280 4 times, resulting in a remainder of 388.
Record the quotient 4 as the next digit in the result. 
Result so far: 40097.58644
The remainder is 388 after subtracting 2892 from 3280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

After the division, we end up with 40097.58644 and a remainder of 0.000388.