80017478 ÷ 431 
The aim is to understand the frequency of 431 in 80017478.

Step 1:
8 divided by 431 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 431

Step 2:
431 goes into 80 0 times with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Bring next digit (0) of the dividend behind the 80 and repeat the process: 800 / 431

Moving on to step 3:
When dividing 800 by 431, we get 1 with a remainder of 369.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 369 after subtracting 431 from 800.
Fetch the next digit (1) from the dividend, attach it to 369 and continue: 3691 / 431

Step 4:
If we divide 3691 by 431, we get 8 and a remainder of 243.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we take 3448 away from 3691, we end up with 243.
Fetch the next digit (7) from the dividend, attach it to 243 and continue: 2437 / 431

Moving on to step 5:
2437 divided by 431 is 5 with a remainder of 282.
Write down 5 as next digit of the result. 
Result so far: 185.0
Deduct 2155 from 2437 and we're left with 282.
Include the next digit (4) from the dividend after 282, then repeat: 2824 / 431

Advancing to step 6:
431 goes into 2824 6 times with a remainder of 238.
The next digit of our result is 6. 
Result so far: 1856.0
If we take 2586 away from 2824, we end up with 238.
Grab the next digit (7) from the dividend, add it to 238, then carry on: 2387 / 431

Moving on to step 7:
If we divide 2387 by 431, we get 5 and a remainder of 232.
Record the quotient 5 as the next digit in the result. 
Result so far: 18565.0
If we take 2155 away from 2387, we end up with 232.
Include the next digit (8) from the dividend after 232, then repeat: 2328 / 431

On to step 8:
2328 divided by 431 is 5 with a remainder of 173.
Put 5 as the next digit of the answer. 
Result so far: 185655.0
Subtract 2155 from 2328 to get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Let's proceed to step 9:
1730 divided by 431 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 185655.4
If we take 1724 away from 1730, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 10:
60 divided by 431 is 0 with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 185655.4
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 11:
431 can be fit into 600 1 times, resulting in a remainder of 169.
The number 1 becomes the next digit in our result. 
Result so far: 185655.401
If we subtract 431 from 600, we get 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Going ahead to step 12:
431 can be fit into 1690 3 times, resulting in a remainder of 397.
Record the quotient 3 as the next digit in the result. 
Result so far: 185655.4013
The remainder is 397 after subtracting 1293 from 1690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

On to step 13:
If we divide 3970 by 431, we get 9 and a remainder of 91.
The number 9 becomes the next digit in our result. 
Result so far: 185655.40139
If we subtract 3879 from 3970, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 14:
431 goes into 910 2 times with a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 185655.401392
Deduct 862 from 910 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 15:
If we divide 480 by 431, we get 1 and a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 185655.4013921
Deduct 431 from 480 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 16:
431 can be fit into 490 1 times, resulting in a remainder of 59.
Use 1 as the next digit of our solution. 
Result so far: 185655.40139211
If we take 431 away from 490, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Our division results in 185655.40139211 with a remaining 5.9e-08.