We look at the division of 72590721 by 58 
The aim is to understand the frequency of 58 in 72590721.

Moving on to step 1:
7 divided by 58 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 58

Step 2:
72 divided by 58 is 1 with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 58 from 72 and we're left with 14.
Append the next digit (5) from the dividend to 14 and continue with: 145 / 58

Going ahead to step 3:
58 can be fit into 145 2 times, resulting in a remainder of 29.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 29 after subtracting 116 from 145.
Grab the next digit (9) from the dividend, add it to 29, then carry on: 299 / 58

Advancing to step 4:
58 goes into 299 5 times with a remainder of 9.
The next digit of our result is 5. 
Result so far: 125.0
If we subtract 290 from 299, we get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 58

Let's proceed to step 5:
58 can be fit into 90 1 times, resulting in a remainder of 32.
Write down 1 as next digit of the result. 
Result so far: 1251.0
If we subtract 58 from 90, we get 32.
Fetch the next digit (7) from the dividend, attach it to 32 and continue: 327 / 58

Let's proceed to step 6:
When dividing 327 by 58, we get 5 with a remainder of 37.
The next digit of our result is 5. 
Result so far: 12515.0
If we take 290 away from 327, we end up with 37.
Include the next digit (2) from the dividend after 37, then repeat: 372 / 58

Step 7:
When dividing 372 by 58, we get 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 125156.0
Subtract 348 from 372 to get 24.
Bring next digit (1) of the dividend behind the 24 and repeat the process: 241 / 58

Advancing to step 8:
If we divide 241 by 58, we get 4 and a remainder of 9.
The next digit of our result is 4. 
Result so far: 1251564.0
Subtract 232 from 241 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
90 divided by 58 is 1 with a remainder of 32.
Record the quotient 1 as the next digit in the result. 
Result so far: 1251564.1
Deduct 58 from 90 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 10:
58 goes into 320 5 times with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 1251564.15
Subtracting 290 from 320 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
If we divide 300 by 58, we get 5 and a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 1251564.155
Subtract 290 from 300 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 1251564.155 with a remaining 0.001.