We look at the division of 721578 by 93 
The aim is to understand the frequency of 93 in 721578.

Let's proceed to step 1:
When dividing 7 by 93, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 93

Moving on to step 2:
If we divide 72 by 93, we get 0 and a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Grab the next digit (1) from the dividend, add it to 72, then carry on: 721 / 93

Moving on to step 3:
721 divided by 93 is 7 with a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 651 from 721, we get 70.
Fetch the next digit (5) from the dividend, attach it to 70 and continue: 705 / 93

Advancing to step 4:
93 can be fit into 705 7 times, resulting in a remainder of 54.
The next digit of our result is 7. 
Result so far: 77.0
If we subtract 651 from 705, we get 54.
Take the next digit (7) from the dividend and append it to 54, then repeat: 547 / 93

On to step 5:
The number 93 fits into 547 5 times, leaving a remainder of 82.
The number 5 becomes the next digit in our result. 
Result so far: 775.0
If we subtract 465 from 547, we get 82.
Take the next digit (8) from the dividend and append it to 82, then repeat: 828 / 93

Step 6:
93 can be fit into 828 8 times, resulting in a remainder of 84.
The number 8 becomes the next digit in our result. 
Result so far: 7758.0
Deduct 744 from 828 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 7:
93 can be fit into 840 9 times, resulting in a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 7758.9
Subtracting 837 from 840 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
93 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 7758.9
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
The number 93 fits into 300 3 times, leaving a remainder of 21.
The next digit of our result is 3. 
Result so far: 7758.903
If we take 279 away from 300, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 10:
210 divided by 93 is 2 with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 7758.9032
If we take 186 away from 210, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
93 goes into 240 2 times with a remainder of 54.
Write down 2 as next digit of the result. 
Result so far: 7758.90322
Subtracting 186 from 240 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Our division results in 7758.90322 with a remaining 5.4e-05.