We look at the division of 43487241 by 375 
The aim is to understand the frequency of 375 in 43487241.

Step 1:
When dividing 4 by 375, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 375

Advancing to step 2:
If we divide 43 by 375, we get 0 and a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Take the next digit (4) from the dividend and append it to 43, then repeat: 434 / 375

Let's proceed to step 3:
When dividing 434 by 375, we get 1 with a remainder of 59.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 59 after subtracting 375 from 434.
Include the next digit (8) from the dividend after 59, then repeat: 598 / 375

Going ahead to step 4:
When dividing 598 by 375, we get 1 with a remainder of 223.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 375 from 598 to get 223.
Grab the next digit (7) from the dividend, add it to 223, then carry on: 2237 / 375

Advancing to step 5:
375 goes into 2237 5 times with a remainder of 362.
The next digit of our result is 5. 
Result so far: 115.0
The remainder is 362 after subtracting 1875 from 2237.
Append the next digit (2) from the dividend to 362 and continue with: 3622 / 375

Step 6:
375 goes into 3622 9 times with a remainder of 247.
Write down 9 as next digit of the result. 
Result so far: 1159.0
If we subtract 3375 from 3622, we get 247.
Include the next digit (4) from the dividend after 247, then repeat: 2474 / 375

Moving on to step 7:
2474 divided by 375 is 6 with a remainder of 224.
Write down 6 as next digit of the result. 
Result so far: 11596.0
If we subtract 2250 from 2474, we get 224.
Take the next digit (1) from the dividend and append it to 224, then repeat: 2241 / 375

Step 8:
If we divide 2241 by 375, we get 5 and a remainder of 366.
Use 5 as the next digit of our solution. 
Result so far: 115965.0
Subtracting 1875 from 2241 leaves us with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Step 9:
If we divide 3660 by 375, we get 9 and a remainder of 285.
Record the quotient 9 as the next digit in the result. 
Result so far: 115965.9
The remainder is 285 after subtracting 3375 from 3660.
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 10:
The number 375 fits into 2850 7 times, leaving a remainder of 225.
Use 7 as the next digit of our solution. 
Result so far: 115965.97
Subtract 2625 from 2850 to get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Moving on to step 11:
375 goes into 2250 6 times with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 115965.976
If we take 2250 away from 2250, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 12:
When dividing 0 by 375, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 115965.976
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
When dividing 0 by 375, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 115965.976
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 115965.976 with a remainder of 0.0.