17509212 ÷ 43 
The aim is to understand the frequency of 43 in 17509212.

Let's proceed to step 1:
If we divide 1 by 43, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 43

Moving on to step 2:
43 can be fit into 17 0 times, resulting in a remainder of 17.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Include the next digit (5) from the dividend after 17, then repeat: 175 / 43

Step 3:
The number 43 fits into 175 4 times, leaving a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 172 away from 175, we end up with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 43

Moving on to step 4:
43 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 40.0
The remainder is 30 after subtracting 0 from 30.
Bring next digit (9) of the dividend behind the 30 and repeat the process: 309 / 43

Moving on to step 5:
43 can be fit into 309 7 times, resulting in a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 407.0
If we take 301 away from 309, we end up with 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 43

Step 6:
43 can be fit into 82 1 times, resulting in a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 4071.0
Deduct 43 from 82 and we're left with 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 43

Moving on to step 7:
When dividing 391 by 43, we get 9 with a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 40719.0
Subtract 387 from 391 to get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 43

Advancing to step 8:
43 can be fit into 42 0 times, resulting in a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 407190.0
If we take 0 away from 42, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 9:
43 can be fit into 420 9 times, resulting in a remainder of 33.
Write down 9 as next digit of the result. 
Result so far: 407190.9
Subtracting 387 from 420 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 10:
If we divide 330 by 43, we get 7 and a remainder of 29.
Record the quotient 7 as the next digit in the result. 
Result so far: 407190.97
The remainder is 29 after subtracting 301 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 11:
The number 43 fits into 290 6 times, leaving a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 407190.976
The remainder is 32 after subtracting 258 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 12:
When dividing 320 by 43, we get 7 with a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 407190.9767
Deduct 301 from 320 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 13:
190 divided by 43 is 4 with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 407190.97674
If we take 172 away from 190, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 14:
If we divide 180 by 43, we get 4 and a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 407190.976744
If we subtract 172 from 180, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 407190.976744, and the remainder is 8e-07.