10143573 ÷ 439 
The aim is to understand the frequency of 439 in 10143573.

Going ahead to step 1:
439 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 439

Step 2:
When dividing 10 by 439, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 10 after subtracting 0 from 10.
Fetch the next digit (1) from the dividend, attach it to 10 and continue: 101 / 439

Advancing to step 3:
When dividing 101 by 439, we get 0 with a remainder of 101.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 101 to get 101.
Fetch the next digit (4) from the dividend, attach it to 101 and continue: 1014 / 439

Advancing to step 4:
The number 439 fits into 1014 2 times, leaving a remainder of 136.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 878 from 1014 leaves us with 136.
Bring next digit (3) of the dividend behind the 136 and repeat the process: 1363 / 439

On to step 5:
1363 divided by 439 is 3 with a remainder of 46.
Use 3 as the next digit of our solution. 
Result so far: 23.0
If we take 1317 away from 1363, we end up with 46.
Append the next digit (5) from the dividend to 46 and continue with: 465 / 439

Let's proceed to step 6:
439 can be fit into 465 1 times, resulting in a remainder of 26.
Record the quotient 1 as the next digit in the result. 
Result so far: 231.0
Subtracting 439 from 465 leaves us with 26.
Fetch the next digit (7) from the dividend, attach it to 26 and continue: 267 / 439

Step 7:
267 divided by 439 is 0 with a remainder of 267.
The number 0 becomes the next digit in our result. 
Result so far: 2310.0
The remainder is 267 after subtracting 0 from 267.
Fetch the next digit (3) from the dividend, attach it to 267 and continue: 2673 / 439

Step 8:
When dividing 2673 by 439, we get 6 with a remainder of 39.
Record the quotient 6 as the next digit in the result. 
Result so far: 23106.0
If we take 2634 away from 2673, 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.

Step 9:
When dividing 390 by 439, we get 0 with a remainder of 390.
Record the quotient 0 as the next digit in the result. 
Result so far: 23106.0
Subtract 0 from 390 to get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Step 10:
439 goes into 3900 8 times with a remainder of 388.
The number 8 becomes the next digit in our result. 
Result so far: 23106.08
If we subtract 3512 from 3900, we get 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Advancing to step 11:
439 goes into 3880 8 times with a remainder of 368.
The number 8 becomes the next digit in our result. 
Result so far: 23106.088
Subtract 3512 from 3880 to get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

After the division, we end up with 23106.088 and a remainder of 0.0368.