We're dividing 40530921 by 431 
The aim is to understand the frequency of 431 in 40530921.

Moving on to step 1:
The number 431 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 431

Step 2:
431 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 431

Advancing to step 3:
431 can be fit into 405 0 times, resulting in a remainder of 405.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 405 and we're left with 405.
Fetch the next digit (3) from the dividend, attach it to 405 and continue: 4053 / 431

Moving on to step 4:
4053 divided by 431 is 9 with a remainder of 174.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 3879 from 4053 and we're left with 174.
Append the next digit (0) from the dividend to 174 and continue with: 1740 / 431

Going ahead to step 5:
431 can be fit into 1740 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 94.0
Subtract 1724 from 1740 to get 16.
Include the next digit (9) from the dividend after 16, then repeat: 169 / 431

Going ahead to step 6:
169 divided by 431 is 0 with a remainder of 169.
The next digit of our result is 0. 
Result so far: 940.0
If we take 0 away from 169, we end up with 169.
Append the next digit (2) from the dividend to 169 and continue with: 1692 / 431

Moving on to step 7:
431 goes into 1692 3 times with a remainder of 399.
Put 3 as the next digit of the answer. 
Result so far: 9403.0
Deduct 1293 from 1692 and we're left with 399.
Fetch the next digit (1) from the dividend, attach it to 399 and continue: 3991 / 431

Going ahead to step 8:
The number 431 fits into 3991 9 times, leaving a remainder of 112.
The next digit of our result is 9. 
Result so far: 94039.0
If we subtract 3879 from 3991, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 9:
If we divide 1120 by 431, we get 2 and a remainder of 258.
Use 2 as the next digit of our solution. 
Result so far: 94039.2
Deduct 862 from 1120 and we're left with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Advancing to step 10:
431 goes into 2580 5 times with a remainder of 425.
Use 5 as the next digit of our solution. 
Result so far: 94039.25
Deduct 2155 from 2580 and we're left with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Step 11:
If we divide 4250 by 431, we get 9 and a remainder of 371.
Put 9 as the next digit of the answer. 
Result so far: 94039.259
Deduct 3879 from 4250 and we're left with 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Step 12:
If we divide 3710 by 431, we get 8 and a remainder of 262.
The next digit of our result is 8. 
Result so far: 94039.2598
Subtracting 3448 from 3710 leaves us with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Moving on to step 13:
431 can be fit into 2620 6 times, resulting in a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 94039.25986
Subtracting 2586 from 2620 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 14:
If we divide 340 by 431, we get 0 and a remainder of 340.
Use 0 as the next digit of our solution. 
Result so far: 94039.25986
Subtract 0 from 340 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Let's proceed to step 15:
431 can be fit into 3400 7 times, resulting in a remainder of 383.
Write down 7 as next digit of the result. 
Result so far: 94039.2598607
Subtracting 3017 from 3400 leaves us with 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

Step 16:
The number 431 fits into 3830 8 times, leaving a remainder of 382.
Write down 8 as next digit of the result. 
Result so far: 94039.25986078
Subtract 3448 from 3830 to get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

In conclusion, the division gives 94039.25986078 with a balance of 3.82e-07.