We look at the division of 391924 by 58 
The aim is to understand the frequency of 58 in 391924.

Step 1:
If we divide 3 by 58, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 58

Moving on to step 2:
If we divide 39 by 58, we get 0 and a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Fetch the next digit (1) from the dividend, attach it to 39 and continue: 391 / 58

Going ahead to step 3:
When dividing 391 by 58, we get 6 with a remainder of 43.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 348 from 391 leaves us with 43.
Append the next digit (9) from the dividend to 43 and continue with: 439 / 58

Let's proceed to step 4:
439 divided by 58 is 7 with a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 67.0
If we subtract 406 from 439, we get 33.
Take the next digit (2) from the dividend and append it to 33, then repeat: 332 / 58

Going ahead to step 5:
332 divided by 58 is 5 with a remainder of 42.
Write down 5 as next digit of the result. 
Result so far: 675.0
Deduct 290 from 332 and we're left with 42.
Grab the next digit (4) from the dividend, add it to 42, then carry on: 424 / 58

Moving on to step 6:
The number 58 fits into 424 7 times, leaving a remainder of 18.
The number 7 becomes the next digit in our result. 
Result so far: 6757.0
If we take 406 away from 424, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 7:
If we divide 180 by 58, we get 3 and a remainder of 6.
The next digit of our result is 3. 
Result so far: 6757.3
Subtracting 174 from 180 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
The number 58 fits into 60 1 times, leaving a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 6757.31
Subtract 58 from 60 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
20 divided by 58 is 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 6757.31
Deduct 0 from 20 and we're left 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 10:
200 divided by 58 is 3 with a remainder of 26.
Put 3 as the next digit of the answer. 
Result so far: 6757.3103
If we take 174 away from 200, we end up 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.

Advancing to step 11:
58 goes into 260 4 times with a remainder of 28.
The next digit of our result is 4. 
Result so far: 6757.31034
Deduct 232 from 260 and we're left 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.

Going ahead to step 12:
If we divide 280 by 58, we get 4 and a remainder of 48.
The next digit of our result is 4. 
Result so far: 6757.310344
Deduct 232 from 280 and we're left with 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 outcome is 6757.310344, with a leftover of 4.8e-06.