We're dividing 905161 by 75 
The aim is to understand the frequency of 75 in 905161.

Going ahead to step 1:
The number 75 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 75

Let's proceed to step 2:
The number 75 fits into 90 1 times, leaving a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 75 from 90 and we're left with 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 75

On to step 3:
155 divided by 75 is 2 with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 150 from 155 leaves us with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 75

Step 4:
When dividing 51 by 75, we get 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 120.0
Deduct 0 from 51 and we're left with 51.
Append the next digit (6) from the dividend to 51 and continue with: 516 / 75

Advancing to step 5:
The number 75 fits into 516 6 times, leaving a remainder of 66.
The next digit of our result is 6. 
Result so far: 1206.0
The remainder is 66 after subtracting 450 from 516.
Include the next digit (1) from the dividend after 66, then repeat: 661 / 75

Moving on to step 6:
If we divide 661 by 75, we get 8 and a remainder of 61.
Use 8 as the next digit of our solution. 
Result so far: 12068.0
Subtract 600 from 661 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 7:
If we divide 610 by 75, we get 8 and a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 12068.8
Subtracting 600 from 610 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 75 fits into 100 1 times, leaving a remainder of 25.
Put 1 as the next digit of the answer. 
Result so far: 12068.81
Deduct 75 from 100 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
75 can be fit into 250 3 times, resulting in a remainder of 25.
Use 3 as the next digit of our solution. 
Result so far: 12068.813
Subtracting 225 from 250 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 10:
If we divide 250 by 75, we get 3 and a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 12068.8133
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.

The final result is 12068.8133 with a remainder of 0.00025.