We're dividing 66490416 by 583 
The aim is to understand the frequency of 583 in 66490416.

Advancing to step 1:
6 divided by 583 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 583

Going ahead to step 2:
The number 583 fits into 66 0 times, leaving a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Grab the next digit (4) from the dividend, add it to 66, then carry on: 664 / 583

Moving on to step 3:
If we divide 664 by 583, we get 1 and a remainder of 81.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 583 from 664 to get 81.
Take the next digit (9) from the dividend and append it to 81, then repeat: 819 / 583

Advancing to step 4:
When dividing 819 by 583, we get 1 with a remainder of 236.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
The remainder is 236 after subtracting 583 from 819.
Append the next digit (0) from the dividend to 236 and continue with: 2360 / 583

On to step 5:
The number 583 fits into 2360 4 times, leaving a remainder of 28.
The next digit of our result is 4. 
Result so far: 114.0
Subtract 2332 from 2360 to get 28.
Bring next digit (4) of the dividend behind the 28 and repeat the process: 284 / 583

Step 6:
284 divided by 583 is 0 with a remainder of 284.
Record the quotient 0 as the next digit in the result. 
Result so far: 1140.0
The remainder is 284 after subtracting 0 from 284.
Fetch the next digit (1) from the dividend, attach it to 284 and continue: 2841 / 583

Step 7:
583 can be fit into 2841 4 times, resulting in a remainder of 509.
Put 4 as the next digit of the answer. 
Result so far: 11404.0
Deduct 2332 from 2841 and we're left with 509.
Take the next digit (6) from the dividend and append it to 509, then repeat: 5096 / 583

Let's proceed to step 8:
5096 divided by 583 is 8 with a remainder of 432.
The number 8 becomes the next digit in our result. 
Result so far: 114048.0
Subtracting 4664 from 5096 leaves us with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Let's proceed to step 9:
The number 583 fits into 4320 7 times, leaving a remainder of 239.
Use 7 as the next digit of our solution. 
Result so far: 114048.7
The remainder is 239 after subtracting 4081 from 4320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Step 10:
When dividing 2390 by 583, we get 4 with a remainder of 58.
The number 4 becomes the next digit in our result. 
Result so far: 114048.74
If we subtract 2332 from 2390, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 11:
583 goes into 580 0 times with a remainder of 580.
Record the quotient 0 as the next digit in the result. 
Result so far: 114048.74
Subtract 0 from 580 to get 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Moving on to step 12:
583 goes into 5800 9 times with a remainder of 553.
Use 9 as the next digit of our solution. 
Result so far: 114048.7409
The remainder is 553 after subtracting 5247 from 5800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5530, and continue the process.

Moving on to step 13:
5530 divided by 583 is 9 with a remainder of 283.
Use 9 as the next digit of our solution. 
Result so far: 114048.74099
The remainder is 283 after subtracting 5247 from 5530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

The final outcome is 114048.74099, with a leftover of 0.000283.