65388209 ÷ 581 
The aim is to understand the frequency of 581 in 65388209.

Let's proceed to step 1:
581 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 581

Step 2:
The number 581 fits into 65 0 times, leaving a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 65, we end up with 65.
Fetch the next digit (3) from the dividend, attach it to 65 and continue: 653 / 581

Moving on to step 3:
653 divided by 581 is 1 with a remainder of 72.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 581 from 653 to get 72.
Include the next digit (8) from the dividend after 72, then repeat: 728 / 581

Going ahead to step 4:
728 divided by 581 is 1 with a remainder of 147.
Write down 1 as next digit of the result. 
Result so far: 11.0
If we subtract 581 from 728, we get 147.
Bring next digit (8) of the dividend behind the 147 and repeat the process: 1478 / 581

Step 5:
When dividing 1478 by 581, we get 2 with a remainder of 316.
The number 2 becomes the next digit in our result. 
Result so far: 112.0
Subtract 1162 from 1478 to get 316.
Include the next digit (2) from the dividend after 316, then repeat: 3162 / 581

Step 6:
When dividing 3162 by 581, we get 5 with a remainder of 257.
Put 5 as the next digit of the answer. 
Result so far: 1125.0
Subtracting 2905 from 3162 leaves us with 257.
Include the next digit (0) from the dividend after 257, then repeat: 2570 / 581

Let's proceed to step 7:
2570 divided by 581 is 4 with a remainder of 246.
Write down 4 as next digit of the result. 
Result so far: 11254.0
If we subtract 2324 from 2570, we get 246.
Take the next digit (9) from the dividend and append it to 246, then repeat: 2469 / 581

On to step 8:
2469 divided by 581 is 4 with a remainder of 145.
Write down 4 as next digit of the result. 
Result so far: 112544.0
The remainder is 145 after subtracting 2324 from 2469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 9:
If we divide 1450 by 581, we get 2 and a remainder of 288.
Write down 2 as next digit of the result. 
Result so far: 112544.2
Subtracting 1162 from 1450 leaves us with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Step 10:
When dividing 2880 by 581, we get 4 with a remainder of 556.
Put 4 as the next digit of the answer. 
Result so far: 112544.24
The remainder is 556 after subtracting 2324 from 2880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Advancing to step 11:
When dividing 5560 by 581, we get 9 with a remainder of 331.
The next digit of our result is 9. 
Result so far: 112544.249
Subtracting 5229 from 5560 leaves us with 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

On to step 12:
The number 581 fits into 3310 5 times, leaving a remainder of 405.
The next digit of our result is 5. 
Result so far: 112544.2495
If we subtract 2905 from 3310, we get 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Going ahead to step 13:
581 goes into 4050 6 times with a remainder of 564.
Write down 6 as next digit of the result. 
Result so far: 112544.24956
Subtract 3486 from 4050 to get 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Going ahead to step 14:
5640 divided by 581 is 9 with a remainder of 411.
The number 9 becomes the next digit in our result. 
Result so far: 112544.249569
Subtract 5229 from 5640 to get 411.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4110, and continue the process.

On to step 15:
581 goes into 4110 7 times with a remainder of 43.
The next digit of our result is 7. 
Result so far: 112544.2495697
If we take 4067 away from 4110, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 16:
When dividing 430 by 581, we get 0 with a remainder of 430.
Write down 0 as next digit of the result. 
Result so far: 112544.2495697
If we take 0 away from 430, we end up with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

After the division, we end up with 112544.2495697 and a remainder of 4.3e-07.