Let's divide 1373207 by 439
The aim is to understand the frequency of 439 in 1373207.

Going ahead to step 1:
If we divide 1 by 439, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 439

On to step 2:
When dividing 13 by 439, we get 0 with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 439

Let's proceed to step 3:
When dividing 137 by 439, we get 0 with a remainder of 137.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 137, we end up with 137.
Fetch the next digit (3) from the dividend, attach it to 137 and continue: 1373 / 439

Advancing to step 4:
1373 divided by 439 is 3 with a remainder of 56.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 1317 from 1373 and we're left with 56.
Include the next digit (2) from the dividend after 56, then repeat: 562 / 439

Moving on to step 5:
When dividing 562 by 439, we get 1 with a remainder of 123.
The next digit of our result is 1. 
Result so far: 31.0
Subtracting 439 from 562 leaves us with 123.
Take the next digit (0) from the dividend and append it to 123, then repeat: 1230 / 439

Step 6:
439 can be fit into 1230 2 times, resulting in a remainder of 352.
Put 2 as the next digit of the answer. 
Result so far: 312.0
Deduct 878 from 1230 and we're left with 352.
Bring next digit (7) of the dividend behind the 352 and repeat the process: 3527 / 439

On to step 7:
The number 439 fits into 3527 8 times, leaving a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 3128.0
If we subtract 3512 from 3527, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 8:
The number 439 fits into 150 0 times, leaving a remainder of 150.
The number 0 becomes the next digit in our result. 
Result so far: 3128.0
Deduct 0 from 150 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 9:
If we divide 1500 by 439, we get 3 and a remainder of 183.
The number 3 becomes the next digit in our result. 
Result so far: 3128.03
The remainder is 183 after subtracting 1317 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Moving on to step 10:
1830 divided by 439 is 4 with a remainder of 74.
The number 4 becomes the next digit in our result. 
Result so far: 3128.034
The remainder is 74 after subtracting 1756 from 1830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 11:
439 goes into 740 1 times with a remainder of 301.
Record the quotient 1 as the next digit in the result. 
Result so far: 3128.0341
Subtract 439 from 740 to get 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Step 12:
439 goes into 3010 6 times with a remainder of 376.
Record the quotient 6 as the next digit in the result. 
Result so far: 3128.03416
The remainder is 376 after subtracting 2634 from 3010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

On to step 13:
439 goes into 3760 8 times with a remainder of 248.
Write down 8 as next digit of the result. 
Result so far: 3128.034168
Subtracting 3512 from 3760 leaves us with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Going ahead to step 14:
When dividing 2480 by 439, we get 5 with a remainder of 285.
Record the quotient 5 as the next digit in the result. 
Result so far: 3128.0341685
Subtract 2195 from 2480 to get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

On to step 15:
The number 439 fits into 2850 6 times, leaving a remainder of 216.
Record the quotient 6 as the next digit in the result. 
Result so far: 3128.03416856
The remainder is 216 after subtracting 2634 from 2850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

The final result is 3128.03416856 with a remainder of 2.16e-07.