We look at the division of 43580516 by 256 
The aim is to understand the frequency of 256 in 43580516.

On to step 1:
The number 256 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 256

Moving on to step 2:
The number 256 fits into 43 0 times, leaving a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Take the next digit (5) from the dividend and append it to 43, then repeat: 435 / 256

On to step 3:
256 can be fit into 435 1 times, resulting in a remainder of 179.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 256 from 435 to get 179.
Bring next digit (8) of the dividend behind the 179 and repeat the process: 1798 / 256

On to step 4:
256 goes into 1798 7 times with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we take 1792 away from 1798, we end up with 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 256

On to step 5:
60 divided by 256 is 0 with a remainder of 60.
The next digit of our result is 0. 
Result so far: 170.0
Deduct 0 from 60 and we're left with 60.
Bring next digit (5) of the dividend behind the 60 and repeat the process: 605 / 256

Advancing to step 6:
When dividing 605 by 256, we get 2 with a remainder of 93.
The next digit of our result is 2. 
Result so far: 1702.0
Subtract 512 from 605 to get 93.
Grab the next digit (1) from the dividend, add it to 93, then carry on: 931 / 256

Moving on to step 7:
If we divide 931 by 256, we get 3 and a remainder of 163.
Record the quotient 3 as the next digit in the result. 
Result so far: 17023.0
Subtracting 768 from 931 leaves us with 163.
Fetch the next digit (6) from the dividend, attach it to 163 and continue: 1636 / 256

Going ahead to step 8:
The number 256 fits into 1636 6 times, leaving a remainder of 100.
Put 6 as the next digit of the answer. 
Result so far: 170236.0
Subtracting 1536 from 1636 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 9:
1000 divided by 256 is 3 with a remainder of 232.
Put 3 as the next digit of the answer. 
Result so far: 170236.3
Subtract 768 from 1000 to get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Moving on to step 10:
256 can be fit into 2320 9 times, resulting in a remainder of 16.
The next digit of our result is 9. 
Result so far: 170236.39
If we subtract 2304 from 2320, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
256 goes into 160 0 times with a remainder of 160.
Record the quotient 0 as the next digit in the result. 
Result so far: 170236.39
If we take 0 away from 160, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 12:
The number 256 fits into 1600 6 times, leaving a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 170236.3906
If we take 1536 away from 1600, 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.

Let's proceed to step 13:
640 divided by 256 is 2 with a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 170236.39062
If we subtract 512 from 640, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 14:
The number 256 fits into 1280 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 170236.390625
Subtract 1280 from 1280 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 15:
When dividing 0 by 256, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 170236.390625
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 16:
0 divided by 256 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 170236.390625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 170236.390625 and a remainder of 0.0.