74131780 ÷ 86 
The aim is to understand the frequency of 86 in 74131780.

Let's proceed to step 1:
86 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 86

Going ahead to step 2:
86 goes into 74 0 times with a remainder of 74.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 74 and we're left with 74.
Grab the next digit (1) from the dividend, add it to 74, then carry on: 741 / 86

Let's proceed to step 3:
741 divided by 86 is 8 with a remainder of 53.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 688 from 741 to get 53.
Grab the next digit (3) from the dividend, add it to 53, then carry on: 533 / 86

Advancing to step 4:
86 goes into 533 6 times with a remainder of 17.
Write down 6 as next digit of the result. 
Result so far: 86.0
Subtracting 516 from 533 leaves us with 17.
Include the next digit (1) from the dividend after 17, then repeat: 171 / 86

Moving on to step 5:
When dividing 171 by 86, we get 1 with a remainder of 85.
The number 1 becomes the next digit in our result. 
Result so far: 861.0
If we take 86 away from 171, we end up with 85.
Take the next digit (7) from the dividend and append it to 85, then repeat: 857 / 86

Moving on to step 6:
When dividing 857 by 86, we get 9 with a remainder of 83.
The number 9 becomes the next digit in our result. 
Result so far: 8619.0
Deduct 774 from 857 and we're left with 83.
Include the next digit (8) from the dividend after 83, then repeat: 838 / 86

Moving on to step 7:
If we divide 838 by 86, we get 9 and a remainder of 64.
The number 9 becomes the next digit in our result. 
Result so far: 86199.0
The remainder is 64 after subtracting 774 from 838.
Append the next digit (0) from the dividend to 64 and continue with: 640 / 86

Advancing to step 8:
The number 86 fits into 640 7 times, leaving a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 861997.0
If we take 602 away from 640, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 9:
The number 86 fits into 380 4 times, leaving a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 861997.4
Deduct 344 from 380 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 10:
360 divided by 86 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 861997.44
Subtracting 344 from 360 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 861997.44 with a remainder of 0.016.