12230257 ÷ 435 
The aim is to understand the frequency of 435 in 12230257.

Going ahead to step 1:
1 divided by 435 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 435

Let's proceed to step 2:
435 can be fit into 12 0 times, resulting in a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Include the next digit (2) from the dividend after 12, then repeat: 122 / 435

Step 3:
The number 435 fits into 122 0 times, leaving a remainder of 122.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 122 to get 122.
Fetch the next digit (3) from the dividend, attach it to 122 and continue: 1223 / 435

Going ahead to step 4:
When dividing 1223 by 435, we get 2 with a remainder of 353.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 353 after subtracting 870 from 1223.
Grab the next digit (0) from the dividend, add it to 353, then carry on: 3530 / 435

On to step 5:
3530 divided by 435 is 8 with a remainder of 50.
The next digit of our result is 8. 
Result so far: 28.0
The remainder is 50 after subtracting 3480 from 3530.
Grab the next digit (2) from the dividend, add it to 50, then carry on: 502 / 435

Moving on to step 6:
502 divided by 435 is 1 with a remainder of 67.
Write down 1 as next digit of the result. 
Result so far: 281.0
Subtract 435 from 502 to get 67.
Append the next digit (5) from the dividend to 67 and continue with: 675 / 435

Moving on to step 7:
The number 435 fits into 675 1 times, leaving a remainder of 240.
Record the quotient 1 as the next digit in the result. 
Result so far: 2811.0
Subtract 435 from 675 to get 240.
Bring next digit (7) of the dividend behind the 240 and repeat the process: 2407 / 435

Going ahead to step 8:
435 can be fit into 2407 5 times, resulting in a remainder of 232.
Write down 5 as next digit of the result. 
Result so far: 28115.0
Subtract 2175 from 2407 to get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Going ahead to step 9:
If we divide 2320 by 435, we get 5 and a remainder of 145.
Put 5 as the next digit of the answer. 
Result so far: 28115.5
If we subtract 2175 from 2320, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Moving on to step 10:
The number 435 fits into 1450 3 times, leaving a remainder of 145.
Write down 3 as next digit of the result. 
Result so far: 28115.53
If we subtract 1305 from 1450, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 11:
If we divide 1450 by 435, we get 3 and a remainder of 145.
The number 3 becomes the next digit in our result. 
Result so far: 28115.533
Subtracting 1305 from 1450 leaves us with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

After the division, we end up with 28115.533 and a remainder of 0.0145.