We look at the division of 79916427 by 581 
The aim is to understand the frequency of 581 in 79916427.

Step 1:
581 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 581

Step 2:
When dividing 79 by 581, we get 0 with a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 79 to get 79.
Include the next digit (9) from the dividend after 79, then repeat: 799 / 581

Let's proceed to step 3:
The number 581 fits into 799 1 times, leaving a remainder of 218.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 218 after subtracting 581 from 799.
Bring next digit (1) of the dividend behind the 218 and repeat the process: 2181 / 581

On to step 4:
If we divide 2181 by 581, we get 3 and a remainder of 438.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we take 1743 away from 2181, we end up with 438.
Fetch the next digit (6) from the dividend, attach it to 438 and continue: 4386 / 581

On to step 5:
The number 581 fits into 4386 7 times, leaving a remainder of 319.
The number 7 becomes the next digit in our result. 
Result so far: 137.0
The remainder is 319 after subtracting 4067 from 4386.
Take the next digit (4) from the dividend and append it to 319, then repeat: 3194 / 581

Step 6:
The number 581 fits into 3194 5 times, leaving a remainder of 289.
The next digit of our result is 5. 
Result so far: 1375.0
Subtract 2905 from 3194 to get 289.
Fetch the next digit (2) from the dividend, attach it to 289 and continue: 2892 / 581

Moving on to step 7:
When dividing 2892 by 581, we get 4 with a remainder of 568.
Write down 4 as next digit of the result. 
Result so far: 13754.0
Subtracting 2324 from 2892 leaves us with 568.
Grab the next digit (7) from the dividend, add it to 568, then carry on: 5687 / 581

On to step 8:
When dividing 5687 by 581, we get 9 with a remainder of 458.
The number 9 becomes the next digit in our result. 
Result so far: 137549.0
Deduct 5229 from 5687 and we're left with 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

Step 9:
The number 581 fits into 4580 7 times, leaving a remainder of 513.
The next digit of our result is 7. 
Result so far: 137549.7
The remainder is 513 after subtracting 4067 from 4580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

Moving on to step 10:
581 can be fit into 5130 8 times, resulting in a remainder of 482.
Use 8 as the next digit of our solution. 
Result so far: 137549.78
Subtract 4648 from 5130 to get 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Moving on to step 11:
581 goes into 4820 8 times with a remainder of 172.
The number 8 becomes the next digit in our result. 
Result so far: 137549.788
Subtracting 4648 from 4820 leaves us with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

The final result is 137549.788 with a remainder of 0.0172.