551645 divided by 75 
The aim is to understand the frequency of 75 in 551645.

Step 1:
5 divided by 75 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 75

Let's proceed to step 2:
55 divided by 75 is 0 with a remainder of 55.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Take the next digit (1) from the dividend and append it to 55, then repeat: 551 / 75

Going ahead to step 3:
75 can be fit into 551 7 times, resulting in a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 525 from 551, we get 26.
Grab the next digit (6) from the dividend, add it to 26, then carry on: 266 / 75

Moving on to step 4:
The number 75 fits into 266 3 times, leaving a remainder of 41.
Write down 3 as next digit of the result. 
Result so far: 73.0
If we take 225 away from 266, we end up with 41.
Take the next digit (4) from the dividend and append it to 41, then repeat: 414 / 75

Let's proceed to step 5:
414 divided by 75 is 5 with a remainder of 39.
Record the quotient 5 as the next digit in the result. 
Result so far: 735.0
The remainder is 39 after subtracting 375 from 414.
Append the next digit (5) from the dividend to 39 and continue with: 395 / 75

Moving on to step 6:
75 can be fit into 395 5 times, resulting in a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 7355.0
If we take 375 away from 395, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 7:
If we divide 200 by 75, we get 2 and a remainder of 50.
Record the quotient 2 as the next digit in the result. 
Result so far: 7355.2
Subtracting 150 from 200 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 8:
The number 75 fits into 500 6 times, leaving a remainder of 50.
Record the quotient 6 as the next digit in the result. 
Result so far: 7355.26
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.

Advancing to step 9:
75 goes into 500 6 times with a remainder of 50.
Write down 6 as next digit of the result. 
Result so far: 7355.266
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 7355.266 with a remaining 0.005.