75390020 ÷ 499 
The aim is to understand the frequency of 499 in 75390020.

Let's proceed to step 1:
If we divide 7 by 499, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 499

Advancing to step 2:
499 can be fit into 75 0 times, resulting in a remainder of 75.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 75 after subtracting 0 from 75.
Append the next digit (3) from the dividend to 75 and continue with: 753 / 499

Moving on to step 3:
499 can be fit into 753 1 times, resulting in a remainder of 254.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 499 from 753, we get 254.
Take the next digit (9) from the dividend and append it to 254, then repeat: 2549 / 499

Going ahead to step 4:
If we divide 2549 by 499, we get 5 and a remainder of 54.
The next digit of our result is 5. 
Result so far: 15.0
Subtracting 2495 from 2549 leaves us with 54.
Include the next digit (0) from the dividend after 54, then repeat: 540 / 499

Step 5:
499 can be fit into 540 1 times, resulting in a remainder of 41.
The next digit of our result is 1. 
Result so far: 151.0
Subtract 499 from 540 to get 41.
Take the next digit (0) from the dividend and append it to 41, then repeat: 410 / 499

Going ahead to step 6:
The number 499 fits into 410 0 times, leaving a remainder of 410.
The number 0 becomes the next digit in our result. 
Result so far: 1510.0
If we subtract 0 from 410, we get 410.
Grab the next digit (2) from the dividend, add it to 410, then carry on: 4102 / 499

Going ahead to step 7:
When dividing 4102 by 499, we get 8 with a remainder of 110.
Use 8 as the next digit of our solution. 
Result so far: 15108.0
If we subtract 3992 from 4102, we get 110.
Grab the next digit (0) from the dividend, add it to 110, then carry on: 1100 / 499

On to step 8:
When dividing 1100 by 499, we get 2 with a remainder of 102.
Record the quotient 2 as the next digit in the result. 
Result so far: 151082.0
Deduct 998 from 1100 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

On to step 9:
499 goes into 1020 2 times with a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 151082.2
The remainder is 22 after subtracting 998 from 1020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 10:
220 divided by 499 is 0 with a remainder of 220.
The number 0 becomes the next digit in our result. 
Result so far: 151082.2
If we subtract 0 from 220, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 11:
2200 divided by 499 is 4 with a remainder of 204.
Use 4 as the next digit of our solution. 
Result so far: 151082.204
Deduct 1996 from 2200 and we're left with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Advancing to step 12:
The number 499 fits into 2040 4 times, leaving a remainder of 44.
Use 4 as the next digit of our solution. 
Result so far: 151082.2044
The remainder is 44 after subtracting 1996 from 2040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final result is 151082.2044 with a remainder of 0.00044.