We look at the division of 80187734 by 423 
The aim is to understand the frequency of 423 in 80187734.

Let's proceed to step 1:
423 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 423

On to step 2:
423 goes into 80 0 times with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 423

On to step 3:
If we divide 801 by 423, we get 1 and a remainder of 378.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 423 from 801 and we're left with 378.
Grab the next digit (8) from the dividend, add it to 378, then carry on: 3788 / 423

Moving on to step 4:
When dividing 3788 by 423, we get 8 with a remainder of 404.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Subtract 3384 from 3788 to get 404.
Append the next digit (7) from the dividend to 404 and continue with: 4047 / 423

On to step 5:
4047 divided by 423 is 9 with a remainder of 240.
The number 9 becomes the next digit in our result. 
Result so far: 189.0
If we take 3807 away from 4047, we end up with 240.
Take the next digit (7) from the dividend and append it to 240, then repeat: 2407 / 423

On to step 6:
2407 divided by 423 is 5 with a remainder of 292.
The number 5 becomes the next digit in our result. 
Result so far: 1895.0
Deduct 2115 from 2407 and we're left with 292.
Bring next digit (3) of the dividend behind the 292 and repeat the process: 2923 / 423

Step 7:
When dividing 2923 by 423, we get 6 with a remainder of 385.
Record the quotient 6 as the next digit in the result. 
Result so far: 18956.0
Deduct 2538 from 2923 and we're left with 385.
Bring next digit (4) of the dividend behind the 385 and repeat the process: 3854 / 423

Going ahead to step 8:
The number 423 fits into 3854 9 times, leaving a remainder of 47.
The next digit of our result is 9. 
Result so far: 189569.0
If we take 3807 away from 3854, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 9:
When dividing 470 by 423, we get 1 with a remainder of 47.
The number 1 becomes the next digit in our result. 
Result so far: 189569.1
Subtracting 423 from 470 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 10:
If we divide 470 by 423, we get 1 and a remainder of 47.
Record the quotient 1 as the next digit in the result. 
Result so far: 189569.11
Subtracting 423 from 470 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The final outcome is 189569.11, with a leftover of 0.047.