We're dividing 43259279 by 581 
The aim is to understand the frequency of 581 in 43259279.

Let's proceed to step 1:
581 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 581

Going ahead to step 2:
The number 581 fits into 43 0 times, leaving a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 43 after subtracting 0 from 43.
Append the next digit (2) from the dividend to 43 and continue with: 432 / 581

Advancing to step 3:
581 goes into 432 0 times with a remainder of 432.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 432 leaves us with 432.
Include the next digit (5) from the dividend after 432, then repeat: 4325 / 581

Step 4:
4325 divided by 581 is 7 with a remainder of 258.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 4067 from 4325 to get 258.
Fetch the next digit (9) from the dividend, attach it to 258 and continue: 2589 / 581

Step 5:
When dividing 2589 by 581, we get 4 with a remainder of 265.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
The remainder is 265 after subtracting 2324 from 2589.
Append the next digit (2) from the dividend to 265 and continue with: 2652 / 581

Let's proceed to step 6:
2652 divided by 581 is 4 with a remainder of 328.
Record the quotient 4 as the next digit in the result. 
Result so far: 744.0
Subtracting 2324 from 2652 leaves us with 328.
Include the next digit (7) from the dividend after 328, then repeat: 3287 / 581

Going ahead to step 7:
The number 581 fits into 3287 5 times, leaving a remainder of 382.
Use 5 as the next digit of our solution. 
Result so far: 7445.0
If we subtract 2905 from 3287, we get 382.
Include the next digit (9) from the dividend after 382, then repeat: 3829 / 581

Let's proceed to step 8:
3829 divided by 581 is 6 with a remainder of 343.
The next digit of our result is 6. 
Result so far: 74456.0
Subtracting 3486 from 3829 leaves us with 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

On to step 9:
If we divide 3430 by 581, we get 5 and a remainder of 525.
Record the quotient 5 as the next digit in the result. 
Result so far: 74456.5
If we subtract 2905 from 3430, we get 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Going ahead to step 10:
The number 581 fits into 5250 9 times, leaving a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 74456.59
The remainder is 21 after subtracting 5229 from 5250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 11:
The number 581 fits into 210 0 times, leaving a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 74456.59
Subtract 0 from 210 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 12:
When dividing 2100 by 581, we get 3 with a remainder of 357.
Put 3 as the next digit of the answer. 
Result so far: 74456.5903
Subtracting 1743 from 2100 leaves us with 357.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

Advancing to step 13:
The number 581 fits into 3570 6 times, leaving a remainder of 84.
The next digit of our result is 6. 
Result so far: 74456.59036
The remainder is 84 after subtracting 3486 from 3570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 14:
The number 581 fits into 840 1 times, leaving a remainder of 259.
The number 1 becomes the next digit in our result. 
Result so far: 74456.590361
If we subtract 581 from 840, we get 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

On to step 15:
581 goes into 2590 4 times with a remainder of 266.
The next digit of our result is 4. 
Result so far: 74456.5903614
Subtract 2324 from 2590 to get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

On to step 16:
581 can be fit into 2660 4 times, resulting in a remainder of 336.
Record the quotient 4 as the next digit in the result. 
Result so far: 74456.59036144
If we subtract 2324 from 2660, we get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

The final outcome is 74456.59036144, with a leftover of 3.36e-07.