52391237 ÷ 439 
The aim is to understand the frequency of 439 in 52391237.

Going ahead to step 1:
If we divide 5 by 439, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 439

Let's proceed to step 2:
439 goes into 52 0 times with a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 52 to get 52.
Fetch the next digit (3) from the dividend, attach it to 52 and continue: 523 / 439

Advancing to step 3:
439 can be fit into 523 1 times, resulting in a remainder of 84.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 84 after subtracting 439 from 523.
Bring next digit (9) of the dividend behind the 84 and repeat the process: 849 / 439

On to step 4:
439 goes into 849 1 times with a remainder of 410.
Write down 1 as next digit of the result. 
Result so far: 11.0
If we take 439 away from 849, we end up with 410.
Include the next digit (1) from the dividend after 410, then repeat: 4101 / 439

On to step 5:
4101 divided by 439 is 9 with a remainder of 150.
Put 9 as the next digit of the answer. 
Result so far: 119.0
If we subtract 3951 from 4101, we get 150.
Append the next digit (2) from the dividend to 150 and continue with: 1502 / 439

Going ahead to step 6:
When dividing 1502 by 439, we get 3 with a remainder of 185.
Record the quotient 3 as the next digit in the result. 
Result so far: 1193.0
Subtracting 1317 from 1502 leaves us with 185.
Take the next digit (3) from the dividend and append it to 185, then repeat: 1853 / 439

Going ahead to step 7:
439 goes into 1853 4 times with a remainder of 97.
Write down 4 as next digit of the result. 
Result so far: 11934.0
If we subtract 1756 from 1853, we get 97.
Grab the next digit (7) from the dividend, add it to 97, then carry on: 977 / 439

Advancing to step 8:
When dividing 977 by 439, we get 2 with a remainder of 99.
Write down 2 as next digit of the result. 
Result so far: 119342.0
Subtracting 878 from 977 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Let's proceed to step 9:
439 goes into 990 2 times with a remainder of 112.
Write down 2 as next digit of the result. 
Result so far: 119342.2
Deduct 878 from 990 and we're left with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Let's proceed to step 10:
1120 divided by 439 is 2 with a remainder of 242.
Record the quotient 2 as the next digit in the result. 
Result so far: 119342.22
If we subtract 878 from 1120, we get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

After the division, we end up with 119342.22 and a remainder of 0.242.