We look at the division of 87430940 by 581 
The aim is to understand the frequency of 581 in 87430940.

Going ahead to step 1:
581 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 581

Moving on to step 2:
If we divide 87 by 581, we get 0 and a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 87, we get 87.
Fetch the next digit (4) from the dividend, attach it to 87 and continue: 874 / 581

On to step 3:
The number 581 fits into 874 1 times, leaving a remainder of 293.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 581 from 874, we get 293.
Grab the next digit (3) from the dividend, add it to 293, then carry on: 2933 / 581

Let's proceed to step 4:
The number 581 fits into 2933 5 times, leaving a remainder of 28.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtract 2905 from 2933 to get 28.
Bring next digit (0) of the dividend behind the 28 and repeat the process: 280 / 581

Moving on to step 5:
581 goes into 280 0 times with a remainder of 280.
The next digit of our result is 0. 
Result so far: 150.0
Subtract 0 from 280 to get 280.
Take the next digit (9) from the dividend and append it to 280, then repeat: 2809 / 581

Let's proceed to step 6:
2809 divided by 581 is 4 with a remainder of 485.
The number 4 becomes the next digit in our result. 
Result so far: 1504.0
Subtract 2324 from 2809 to get 485.
Grab the next digit (4) from the dividend, add it to 485, then carry on: 4854 / 581

Let's proceed to step 7:
581 goes into 4854 8 times with a remainder of 206.
The number 8 becomes the next digit in our result. 
Result so far: 15048.0
Deduct 4648 from 4854 and we're left with 206.
Include the next digit (0) from the dividend after 206, then repeat: 2060 / 581

Advancing to step 8:
If we divide 2060 by 581, we get 3 and a remainder of 317.
Put 3 as the next digit of the answer. 
Result so far: 150483.0
If we subtract 1743 from 2060, we get 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Advancing to step 9:
If we divide 3170 by 581, we get 5 and a remainder of 265.
The number 5 becomes the next digit in our result. 
Result so far: 150483.5
If we take 2905 away from 3170, we end up with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Let's proceed to step 10:
581 can be fit into 2650 4 times, resulting in a remainder of 326.
The next digit of our result is 4. 
Result so far: 150483.54
Subtracting 2324 from 2650 leaves us with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Moving on to step 11:
581 goes into 3260 5 times with a remainder of 355.
Put 5 as the next digit of the answer. 
Result so far: 150483.545
If we take 2905 away from 3260, we end up with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Step 12:
The number 581 fits into 3550 6 times, leaving a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 150483.5456
If we take 3486 away from 3550, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 13:
581 can be fit into 640 1 times, resulting in a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 150483.54561
The remainder is 59 after subtracting 581 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 14:
If we divide 590 by 581, we get 1 and a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 150483.545611
Deduct 581 from 590 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

In conclusion, the division gives 150483.545611 with a balance of 9e-07.