Let's divide 800503 by 75
The aim is to understand the frequency of 75 in 800503.

On to step 1:
8 divided by 75 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 75

Let's proceed to step 2:
If we divide 80 by 75, we get 1 and a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 75 from 80 to get 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 75

Step 3:
The number 75 fits into 50 0 times, leaving a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 50, we get 50.
Grab the next digit (5) from the dividend, add it to 50, then carry on: 505 / 75

On to step 4:
505 divided by 75 is 6 with a remainder of 55.
Use 6 as the next digit of our solution. 
Result so far: 106.0
If we subtract 450 from 505, we get 55.
Grab the next digit (0) from the dividend, add it to 55, then carry on: 550 / 75

Moving on to step 5:
When dividing 550 by 75, we get 7 with a remainder of 25.
The number 7 becomes the next digit in our result. 
Result so far: 1067.0
If we subtract 525 from 550, we get 25.
Append the next digit (3) from the dividend to 25 and continue with: 253 / 75

Let's proceed to step 6:
75 goes into 253 3 times with a remainder of 28.
Use 3 as the next digit of our solution. 
Result so far: 10673.0
Deduct 225 from 253 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 7:
If we divide 280 by 75, we get 3 and a remainder of 55.
Use 3 as the next digit of our solution. 
Result so far: 10673.3
If we subtract 225 from 280, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 8:
550 divided by 75 is 7 with a remainder of 25.
The number 7 becomes the next digit in our result. 
Result so far: 10673.37
Subtract 525 from 550 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
75 can be fit into 250 3 times, resulting in a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 10673.373
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 10:
75 goes into 250 3 times with a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 10673.3733
If we subtract 225 from 250, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 10673.3733 and a remainder of 0.00025.