We're dividing 90876478 by 431 
The aim is to understand the frequency of 431 in 90876478.

Moving on to step 1:
9 divided by 431 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 431

Let's proceed to step 2:
The number 431 fits into 90 0 times, leaving a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Fetch the next digit (8) from the dividend, attach it to 90 and continue: 908 / 431

Going ahead to step 3:
908 divided by 431 is 2 with a remainder of 46.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 862 from 908 leaves us with 46.
Fetch the next digit (7) from the dividend, attach it to 46 and continue: 467 / 431

Going ahead to step 4:
467 divided by 431 is 1 with a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
If we subtract 431 from 467, we get 36.
Grab the next digit (6) from the dividend, add it to 36, then carry on: 366 / 431

Let's proceed to step 5:
366 divided by 431 is 0 with a remainder of 366.
Use 0 as the next digit of our solution. 
Result so far: 210.0
If we subtract 0 from 366, we get 366.
Grab the next digit (4) from the dividend, add it to 366, then carry on: 3664 / 431

Step 6:
3664 divided by 431 is 8 with a remainder of 216.
Write down 8 as next digit of the result. 
Result so far: 2108.0
If we subtract 3448 from 3664, we get 216.
Include the next digit (7) from the dividend after 216, then repeat: 2167 / 431

Step 7:
2167 divided by 431 is 5 with a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 21085.0
Subtracting 2155 from 2167 leaves us with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 431

Advancing to step 8:
431 can be fit into 128 0 times, resulting in a remainder of 128.
The number 0 becomes the next digit in our result. 
Result so far: 210850.0
If we subtract 0 from 128, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Let's proceed to step 9:
When dividing 1280 by 431, we get 2 with a remainder of 418.
The number 2 becomes the next digit in our result. 
Result so far: 210850.2
Deduct 862 from 1280 and we're left with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Going ahead to step 10:
When dividing 4180 by 431, we get 9 with a remainder of 301.
The number 9 becomes the next digit in our result. 
Result so far: 210850.29
The remainder is 301 after subtracting 3879 from 4180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Advancing to step 11:
3010 divided by 431 is 6 with a remainder of 424.
Use 6 as the next digit of our solution. 
Result so far: 210850.296
Deduct 2586 from 3010 and we're left with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

On to step 12:
The number 431 fits into 4240 9 times, leaving a remainder of 361.
Record the quotient 9 as the next digit in the result. 
Result so far: 210850.2969
Subtract 3879 from 4240 to get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Let's proceed to step 13:
431 goes into 3610 8 times with a remainder of 162.
Put 8 as the next digit of the answer. 
Result so far: 210850.29698
Deduct 3448 from 3610 and we're left with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Let's proceed to step 14:
431 goes into 1620 3 times with a remainder of 327.
The number 3 becomes the next digit in our result. 
Result so far: 210850.296983
Subtract 1293 from 1620 to get 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

On to step 15:
When dividing 3270 by 431, we get 7 with a remainder of 253.
Use 7 as the next digit of our solution. 
Result so far: 210850.2969837
If we subtract 3017 from 3270, we get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Step 16:
The number 431 fits into 2530 5 times, leaving a remainder of 375.
Put 5 as the next digit of the answer. 
Result so far: 210850.29698375
Deduct 2155 from 2530 and we're left with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

After the division, we end up with 210850.29698375 and a remainder of 3.75e-07.