79783663 ÷ 581 
The aim is to understand the frequency of 581 in 79783663.

On to step 1:
When dividing 7 by 581, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 581

Let's proceed to step 2:
If we divide 79 by 581, we get 0 and a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 79, we get 79.
Take the next digit (7) from the dividend and append it to 79, then repeat: 797 / 581

Step 3:
When dividing 797 by 581, we get 1 with a remainder of 216.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 581 from 797 and we're left with 216.
Grab the next digit (8) from the dividend, add it to 216, then carry on: 2168 / 581

On to step 4:
581 can be fit into 2168 3 times, resulting in a remainder of 425.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 1743 from 2168 to get 425.
Bring next digit (3) of the dividend behind the 425 and repeat the process: 4253 / 581

Advancing to step 5:
The number 581 fits into 4253 7 times, leaving a remainder of 186.
The number 7 becomes the next digit in our result. 
Result so far: 137.0
Subtracting 4067 from 4253 leaves us with 186.
Bring next digit (6) of the dividend behind the 186 and repeat the process: 1866 / 581

Step 6:
When dividing 1866 by 581, we get 3 with a remainder of 123.
Use 3 as the next digit of our solution. 
Result so far: 1373.0
If we take 1743 away from 1866, we end up with 123.
Take the next digit (6) from the dividend and append it to 123, then repeat: 1236 / 581

Going ahead to step 7:
The number 581 fits into 1236 2 times, leaving a remainder of 74.
Write down 2 as next digit of the result. 
Result so far: 13732.0
Subtract 1162 from 1236 to get 74.
Include the next digit (3) from the dividend after 74, then repeat: 743 / 581

Moving on to step 8:
When dividing 743 by 581, we get 1 with a remainder of 162.
The number 1 becomes the next digit in our result. 
Result so far: 137321.0
If we take 581 away from 743, we end up with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Advancing to step 9:
The number 581 fits into 1620 2 times, leaving a remainder of 458.
The number 2 becomes the next digit in our result. 
Result so far: 137321.2
Subtracting 1162 from 1620 leaves us 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.

On to step 10:
581 can be fit into 4580 7 times, resulting in a remainder of 513.
Write down 7 as next digit of the result. 
Result so far: 137321.27
Deduct 4067 from 4580 and we're left with 513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

On to step 11:
5130 divided by 581 is 8 with a remainder of 482.
The number 8 becomes the next digit in our result. 
Result so far: 137321.278
If we take 4648 away from 5130, we end up with 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

On to step 12:
581 can be fit into 4820 8 times, resulting in a remainder of 172.
Put 8 as the next digit of the answer. 
Result so far: 137321.2788
If we subtract 4648 from 4820, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Our division results in 137321.2788 with a remaining 0.00172.