86481916 ÷ 75 
The aim is to understand the frequency of 75 in 86481916.

Moving on to step 1:
If we divide 8 by 75, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 75

Going ahead to step 2:
If we divide 86 by 75, we get 1 and a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 75 away from 86, we end up with 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 75

Moving on to step 3:
The number 75 fits into 114 1 times, leaving a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 75 away from 114, we end up with 39.
Take the next digit (8) from the dividend and append it to 39, then repeat: 398 / 75

On to step 4:
75 goes into 398 5 times with a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 115.0
If we take 375 away from 398, we end up with 23.
Grab the next digit (1) from the dividend, add it to 23, then carry on: 231 / 75

On to step 5:
When dividing 231 by 75, we get 3 with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 1153.0
Deduct 225 from 231 and we're left with 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 75

Going ahead to step 6:
75 can be fit into 69 0 times, resulting in a remainder of 69.
Record the quotient 0 as the next digit in the result. 
Result so far: 11530.0
If we take 0 away from 69, we end up with 69.
Take the next digit (1) from the dividend and append it to 69, then repeat: 691 / 75

On to step 7:
75 goes into 691 9 times with a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 115309.0
The remainder is 16 after subtracting 675 from 691.
Include the next digit (6) from the dividend after 16, then repeat: 166 / 75

Step 8:
75 can be fit into 166 2 times, resulting in a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 1153092.0
If we subtract 150 from 166, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
160 divided by 75 is 2 with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 1153092.2
The remainder is 10 after subtracting 150 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
75 goes into 100 1 times with a remainder of 25.
Record the quotient 1 as the next digit in the result. 
Result so far: 1153092.21
The remainder is 25 after subtracting 75 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 11:
The number 75 fits into 250 3 times, leaving a remainder of 25.
The number 3 becomes the next digit in our result. 
Result so far: 1153092.213
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.

Going ahead to step 12:
75 goes into 250 3 times with a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 1153092.2133
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.

Our division results in 1153092.2133 with a remaining 0.00025.