We're dividing 223958 by 58 
The aim is to understand the frequency of 58 in 223958.

Step 1:
When dividing 2 by 58, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 58

Let's proceed to step 2:
If we divide 22 by 58, we get 0 and a remainder of 22.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 22 to get 22.
Take the next digit (3) from the dividend and append it to 22, then repeat: 223 / 58

On to step 3:
58 can be fit into 223 3 times, resulting in a remainder of 49.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 174 from 223 to get 49.
Append the next digit (9) from the dividend to 49 and continue with: 499 / 58

Moving on to step 4:
The number 58 fits into 499 8 times, leaving a remainder of 35.
Write down 8 as next digit of the result. 
Result so far: 38.0
The remainder is 35 after subtracting 464 from 499.
Grab the next digit (5) from the dividend, add it to 35, then carry on: 355 / 58

Going ahead to step 5:
58 goes into 355 6 times with a remainder of 7.
The next digit of our result is 6. 
Result so far: 386.0
Deduct 348 from 355 and we're left with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 58

On to step 6:
58 goes into 78 1 times with a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 3861.0
If we take 58 away from 78, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 7:
58 can be fit into 200 3 times, resulting in a remainder of 26.
Put 3 as the next digit of the answer. 
Result so far: 3861.3
Subtracting 174 from 200 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 8:
260 divided by 58 is 4 with a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 3861.34
Subtracting 232 from 260 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 9:
If we divide 280 by 58, we get 4 and a remainder of 48.
Put 4 as the next digit of the answer. 
Result so far: 3861.344
Subtract 232 from 280 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 3861.344 with a remainder of 0.0048.