66430604 ÷ 586 
The aim is to understand the frequency of 586 in 66430604.

Moving on to step 1:
586 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 586

On to step 2:
When dividing 66 by 586, we get 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Grab the next digit (4) from the dividend, add it to 66, then carry on: 664 / 586

Going ahead to step 3:
586 goes into 664 1 times with a remainder of 78.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 586 from 664 and we're left with 78.
Bring next digit (3) of the dividend behind the 78 and repeat the process: 783 / 586

Advancing to step 4:
The number 586 fits into 783 1 times, leaving a remainder of 197.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 197 after subtracting 586 from 783.
Append the next digit (0) from the dividend to 197 and continue with: 1970 / 586

Advancing to step 5:
1970 divided by 586 is 3 with a remainder of 212.
Use 3 as the next digit of our solution. 
Result so far: 113.0
Subtracting 1758 from 1970 leaves us with 212.
Bring next digit (6) of the dividend behind the 212 and repeat the process: 2126 / 586

Let's proceed to step 6:
2126 divided by 586 is 3 with a remainder of 368.
Put 3 as the next digit of the answer. 
Result so far: 1133.0
Subtracting 1758 from 2126 leaves us with 368.
Append the next digit (0) from the dividend to 368 and continue with: 3680 / 586

Step 7:
If we divide 3680 by 586, we get 6 and a remainder of 164.
The number 6 becomes the next digit in our result. 
Result so far: 11336.0
Subtract 3516 from 3680 to get 164.
Fetch the next digit (4) from the dividend, attach it to 164 and continue: 1644 / 586

Advancing to step 8:
1644 divided by 586 is 2 with a remainder of 472.
The number 2 becomes the next digit in our result. 
Result so far: 113362.0
If we subtract 1172 from 1644, we get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Advancing to step 9:
If we divide 4720 by 586, we get 8 and a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 113362.8
The remainder is 32 after subtracting 4688 from 4720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 10:
320 divided by 586 is 0 with a remainder of 320.
Use 0 as the next digit of our solution. 
Result so far: 113362.8
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 11:
3200 divided by 586 is 5 with a remainder of 270.
The number 5 becomes the next digit in our result. 
Result so far: 113362.805
Subtract 2930 from 3200 to get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Let's proceed to step 12:
586 goes into 2700 4 times with a remainder of 356.
The number 4 becomes the next digit in our result. 
Result so far: 113362.8054
If we subtract 2344 from 2700, we get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

On to step 13:
The number 586 fits into 3560 6 times, leaving a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 113362.80546
If we take 3516 away from 3560, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 14:
586 goes into 440 0 times with a remainder of 440.
Write down 0 as next digit of the result. 
Result so far: 113362.80546
Subtract 0 from 440 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 15:
4400 divided by 586 is 7 with a remainder of 298.
The next digit of our result is 7. 
Result so far: 113362.8054607
Subtract 4102 from 4400 to get 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

On to step 16:
The number 586 fits into 2980 5 times, leaving a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 113362.80546075
If we take 2930 away from 2980, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 113362.80546075 and a remainder of 5e-08.