738423 divided by 86 
The aim is to understand the frequency of 86 in 738423.

Going ahead to step 1:
The number 86 fits into 7 0 times, leaving 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 (3) from the dividend, add it to 7, then carry on: 73 / 86

Step 2:
If we divide 73 by 86, we get 0 and a remainder of 73.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 73 and we're left with 73.
Take the next digit (8) from the dividend and append it to 73, then repeat: 738 / 86

Step 3:
86 can be fit into 738 8 times, resulting in a remainder of 50.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 50 after subtracting 688 from 738.
Fetch the next digit (4) from the dividend, attach it to 50 and continue: 504 / 86

On to step 4:
When dividing 504 by 86, we get 5 with a remainder of 74.
The number 5 becomes the next digit in our result. 
Result so far: 85.0
Subtract 430 from 504 to get 74.
Bring next digit (2) of the dividend behind the 74 and repeat the process: 742 / 86

Step 5:
When dividing 742 by 86, we get 8 with a remainder of 54.
Put 8 as the next digit of the answer. 
Result so far: 858.0
If we take 688 away from 742, we end up with 54.
Bring next digit (3) of the dividend behind the 54 and repeat the process: 543 / 86

Let's proceed to step 6:
If we divide 543 by 86, we get 6 and a remainder of 27.
Use 6 as the next digit of our solution. 
Result so far: 8586.0
Subtracting 516 from 543 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 7:
86 can be fit into 270 3 times, resulting in a remainder of 12.
Use 3 as the next digit of our solution. 
Result so far: 8586.3
Subtracting 258 from 270 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 8:
When dividing 120 by 86, we get 1 with a remainder of 34.
Record the quotient 1 as the next digit in the result. 
Result so far: 8586.31
If we subtract 86 from 120, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 9:
If we divide 340 by 86, we get 3 and a remainder of 82.
The next digit of our result is 3. 
Result so far: 8586.313
Subtract 258 from 340 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 10:
86 goes into 820 9 times with a remainder of 46.
Record the quotient 9 as the next digit in the result. 
Result so far: 8586.3139
Deduct 774 from 820 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 11:
If we divide 460 by 86, we get 5 and a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 8586.31395
If we subtract 430 from 460, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 12:
If we divide 300 by 86, we get 3 and a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 8586.313953
Deduct 258 from 300 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 13:
86 goes into 420 4 times with a remainder of 76.
Write down 4 as next digit of the result. 
Result so far: 8586.3139534
The remainder is 76 after subtracting 344 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 14:
760 divided by 86 is 8 with a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 8586.31395348
Subtract 688 from 760 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Our division results in 8586.31395348 with a remaining 7.2e-08.