278129 divided by 75 
The aim is to understand the frequency of 75 in 278129.

On to step 1:
The number 75 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 75

Step 2:
When dividing 27 by 75, we get 0 with a remainder of 27.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 27 after subtracting 0 from 27.
Fetch the next digit (8) from the dividend, attach it to 27 and continue: 278 / 75

Step 3:
278 divided by 75 is 3 with a remainder of 53.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 225 from 278, we get 53.
Grab the next digit (1) from the dividend, add it to 53, then carry on: 531 / 75

Moving on to step 4:
When dividing 531 by 75, we get 7 with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 37.0
Subtracting 525 from 531 leaves us with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 75

On to step 5:
75 goes into 62 0 times with a remainder of 62.
Record the quotient 0 as the next digit in the result. 
Result so far: 370.0
The remainder is 62 after subtracting 0 from 62.
Include the next digit (9) from the dividend after 62, then repeat: 629 / 75

Moving on to step 6:
When dividing 629 by 75, we get 8 with a remainder of 29.
Use 8 as the next digit of our solution. 
Result so far: 3708.0
Deduct 600 from 629 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 7:
75 can be fit into 290 3 times, resulting in a remainder of 65.
Record the quotient 3 as the next digit in the result. 
Result so far: 3708.3
The remainder is 65 after subtracting 225 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 8:
If we divide 650 by 75, we get 8 and a remainder of 50.
The next digit of our result is 8. 
Result so far: 3708.38
If we subtract 600 from 650, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
When dividing 500 by 75, we get 6 with a remainder of 50.
The next digit of our result is 6. 
Result so far: 3708.386
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 10:
75 can be fit into 500 6 times, resulting in a remainder of 50.
The next digit of our result is 6. 
Result so far: 3708.3866
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 3708.3866 with a remaining 0.0005.