We look at the division of 400641 by 75 
The aim is to understand the frequency of 75 in 400641.

Moving on to step 1:
When dividing 4 by 75, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 75

Step 2:
75 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 40 and we're left with 40.
Grab the next digit (0) from the dividend, add it to 40, then carry on: 400 / 75

On to step 3:
The number 75 fits into 400 5 times, leaving a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 375 from 400, we get 25.
Include the next digit (6) from the dividend after 25, then repeat: 256 / 75

Going ahead to step 4:
256 divided by 75 is 3 with a remainder of 31.
Write down 3 as next digit of the result. 
Result so far: 53.0
Subtract 225 from 256 to get 31.
Fetch the next digit (4) from the dividend, attach it to 31 and continue: 314 / 75

Step 5:
75 can be fit into 314 4 times, resulting in a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 534.0
Subtract 300 from 314 to get 14.
Grab the next digit (1) from the dividend, add it to 14, then carry on: 141 / 75

Going ahead to step 6:
If we divide 141 by 75, we get 1 and a remainder of 66.
Write down 1 as next digit of the result. 
Result so far: 5341.0
Subtract 75 from 141 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 7:
75 can be fit into 660 8 times, resulting in a remainder of 60.
The next digit of our result is 8. 
Result so far: 5341.8
Deduct 600 from 660 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
When dividing 600 by 75, we get 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 5341.88
Subtracting 600 from 600 leaves us 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.

Our division results in 5341.88 with a remaining 0.0.