We're dividing 574423 by 86 
The aim is to understand the frequency of 86 in 574423.

Let's proceed to step 1:
If we divide 5 by 86, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 86

Going ahead to step 2:
The number 86 fits into 57 0 times, leaving a remainder of 57.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 57 and we're left with 57.
Append the next digit (4) from the dividend to 57 and continue with: 574 / 86

Let's proceed to step 3:
86 goes into 574 6 times with a remainder of 58.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 516 from 574 to get 58.
Bring next digit (4) of the dividend behind the 58 and repeat the process: 584 / 86

Going ahead to step 4:
If we divide 584 by 86, we get 6 and a remainder of 68.
The next digit of our result is 6. 
Result so far: 66.0
Deduct 516 from 584 and we're left with 68.
Fetch the next digit (2) from the dividend, attach it to 68 and continue: 682 / 86

Moving on to step 5:
If we divide 682 by 86, we get 7 and a remainder of 80.
The number 7 becomes the next digit in our result. 
Result so far: 667.0
If we subtract 602 from 682, we get 80.
Include the next digit (3) from the dividend after 80, then repeat: 803 / 86

Advancing to step 6:
86 can be fit into 803 9 times, resulting in a remainder of 29.
Record the quotient 9 as the next digit in the result. 
Result so far: 6679.0
If we subtract 774 from 803, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 7:
86 can be fit into 290 3 times, resulting in a remainder of 32.
The next digit of our result is 3. 
Result so far: 6679.3
Deduct 258 from 290 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 8:
If we divide 320 by 86, we get 3 and a remainder of 62.
The number 3 becomes the next digit in our result. 
Result so far: 6679.33
If we take 258 away from 320, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The final outcome is 6679.33, with a leftover of 0.062.