We look at the division of 4258576 by 586 
The aim is to understand the frequency of 586 in 4258576.

Advancing to step 1:
The number 586 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 586

Step 2:
586 goes into 42 0 times with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Grab the next digit (5) from the dividend, add it to 42, then carry on: 425 / 586

On to step 3:
The number 586 fits into 425 0 times, leaving a remainder of 425.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 425 leaves us with 425.
Fetch the next digit (8) from the dividend, attach it to 425 and continue: 4258 / 586

On to step 4:
586 goes into 4258 7 times with a remainder of 156.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 4102 away from 4258, we end up with 156.
Bring next digit (5) of the dividend behind the 156 and repeat the process: 1565 / 586

Going ahead to step 5:
586 goes into 1565 2 times with a remainder of 393.
The number 2 becomes the next digit in our result. 
Result so far: 72.0
Subtract 1172 from 1565 to get 393.
Include the next digit (7) from the dividend after 393, then repeat: 3937 / 586

Going ahead to step 6:
If we divide 3937 by 586, we get 6 and a remainder of 421.
Write down 6 as next digit of the result. 
Result so far: 726.0
If we subtract 3516 from 3937, we get 421.
Fetch the next digit (6) from the dividend, attach it to 421 and continue: 4216 / 586

Advancing to step 7:
When dividing 4216 by 586, we get 7 with a remainder of 114.
Put 7 as the next digit of the answer. 
Result so far: 7267.0
If we take 4102 away from 4216, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Step 8:
When dividing 1140 by 586, we get 1 with a remainder of 554.
Use 1 as the next digit of our solution. 
Result so far: 7267.1
Subtracting 586 from 1140 leaves us with 554.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

Going ahead to step 9:
586 can be fit into 5540 9 times, resulting in a remainder of 266.
Put 9 as the next digit of the answer. 
Result so far: 7267.19
The remainder is 266 after subtracting 5274 from 5540.
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 10:
586 goes into 2660 4 times with a remainder of 316.
Record the quotient 4 as the next digit in the result. 
Result so far: 7267.194
If we subtract 2344 from 2660, we get 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Advancing to step 11:
586 goes into 3160 5 times with a remainder of 230.
Use 5 as the next digit of our solution. 
Result so far: 7267.1945
Subtract 2930 from 3160 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Let's proceed to step 12:
586 goes into 2300 3 times with a remainder of 542.
The next digit of our result is 3. 
Result so far: 7267.19453
If we take 1758 away from 2300, we end up with 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Advancing to step 13:
If we divide 5420 by 586, we get 9 and a remainder of 146.
Write down 9 as next digit of the result. 
Result so far: 7267.194539
If we subtract 5274 from 5420, we get 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Let's proceed to step 14:
586 can be fit into 1460 2 times, resulting in a remainder of 288.
The number 2 becomes the next digit in our result. 
Result so far: 7267.1945392
The remainder is 288 after subtracting 1172 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Advancing to step 15:
The number 586 fits into 2880 4 times, leaving a remainder of 536.
Put 4 as the next digit of the answer. 
Result so far: 7267.19453924
Subtract 2344 from 2880 to get 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

The final outcome is 7267.19453924, with a leftover of 5.36e-07.