80330040 ÷ 504 
The aim is to understand the frequency of 504 in 80330040.

Step 1:
If we divide 8 by 504, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 504

Step 2:
80 divided by 504 is 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Grab the next digit (3) from the dividend, add it to 80, then carry on: 803 / 504

Moving on to step 3:
504 can be fit into 803 1 times, resulting in a remainder of 299.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 504 from 803 to get 299.
Append the next digit (3) from the dividend to 299 and continue with: 2993 / 504

On to step 4:
The number 504 fits into 2993 5 times, leaving a remainder of 473.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtracting 2520 from 2993 leaves us with 473.
Fetch the next digit (0) from the dividend, attach it to 473 and continue: 4730 / 504

Step 5:
4730 divided by 504 is 9 with a remainder of 194.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
Deduct 4536 from 4730 and we're left with 194.
Include the next digit (0) from the dividend after 194, then repeat: 1940 / 504

On to step 6:
When dividing 1940 by 504, we get 3 with a remainder of 428.
Use 3 as the next digit of our solution. 
Result so far: 1593.0
Deduct 1512 from 1940 and we're left with 428.
Append the next digit (4) from the dividend to 428 and continue with: 4284 / 504

Let's proceed to step 7:
When dividing 4284 by 504, we get 8 with a remainder of 252.
The next digit of our result is 8. 
Result so far: 15938.0
Subtract 4032 from 4284 to get 252.
Append the next digit (0) from the dividend to 252 and continue with: 2520 / 504

Step 8:
When dividing 2520 by 504, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 159385.0
If we take 2520 away from 2520, 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 9:
504 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 159385.0
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.

On to step 10:
504 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 159385.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 159385.0 and a remainder of 0.0.