We look at the division of 26381993 by 993 
The aim is to understand the frequency of 993 in 26381993.

Step 1:
The number 993 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 993

Let's proceed to step 2:
If we divide 26 by 993, we get 0 and a remainder of 26.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 26 leaves us with 26.
Append the next digit (3) from the dividend to 26 and continue with: 263 / 993

Moving on to step 3:
993 goes into 263 0 times with a remainder of 263.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 263 leaves us with 263.
Include the next digit (8) from the dividend after 263, then repeat: 2638 / 993

Let's proceed to step 4:
2638 divided by 993 is 2 with a remainder of 652.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 1986 from 2638 leaves us with 652.
Bring next digit (1) of the dividend behind the 652 and repeat the process: 6521 / 993

Let's proceed to step 5:
When dividing 6521 by 993, we get 6 with a remainder of 563.
Use 6 as the next digit of our solution. 
Result so far: 26.0
If we take 5958 away from 6521, we end up with 563.
Bring next digit (9) of the dividend behind the 563 and repeat the process: 5639 / 993

On to step 6:
993 goes into 5639 5 times with a remainder of 674.
The number 5 becomes the next digit in our result. 
Result so far: 265.0
If we subtract 4965 from 5639, we get 674.
Include the next digit (9) from the dividend after 674, then repeat: 6749 / 993

Step 7:
6749 divided by 993 is 6 with a remainder of 791.
The next digit of our result is 6. 
Result so far: 2656.0
If we subtract 5958 from 6749, we get 791.
Fetch the next digit (3) from the dividend, attach it to 791 and continue: 7913 / 993

Step 8:
7913 divided by 993 is 7 with a remainder of 962.
Use 7 as the next digit of our solution. 
Result so far: 26567.0
If we subtract 6951 from 7913, we get 962.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9620, and continue the process.

Let's proceed to step 9:
9620 divided by 993 is 9 with a remainder of 683.
Put 9 as the next digit of the answer. 
Result so far: 26567.9
If we take 8937 away from 9620, we end up with 683.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6830, and continue the process.

On to step 10:
When dividing 6830 by 993, we get 6 with a remainder of 872.
Use 6 as the next digit of our solution. 
Result so far: 26567.96
Deduct 5958 from 6830 and we're left with 872.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8720, and continue the process.

Going ahead to step 11:
When dividing 8720 by 993, we get 8 with a remainder of 776.
Record the quotient 8 as the next digit in the result. 
Result so far: 26567.968
If we subtract 7944 from 8720, we get 776.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7760, and continue the process.

On to step 12:
If we divide 7760 by 993, we get 7 and a remainder of 809.
Write down 7 as next digit of the result. 
Result so far: 26567.9687
Deduct 6951 from 7760 and we're left with 809.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8090, and continue the process.

Advancing to step 13:
If we divide 8090 by 993, we get 8 and a remainder of 146.
Use 8 as the next digit of our solution. 
Result so far: 26567.96878
Deduct 7944 from 8090 and we're left with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Going ahead to step 14:
When dividing 1460 by 993, we get 1 with a remainder of 467.
Put 1 as the next digit of the answer. 
Result so far: 26567.968781
If we take 993 away from 1460, we end up with 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Step 15:
4670 divided by 993 is 4 with a remainder of 698.
The number 4 becomes the next digit in our result. 
Result so far: 26567.9687814
Subtracting 3972 from 4670 leaves us with 698.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6980, and continue the process.

Step 16:
6980 divided by 993 is 7 with a remainder of 29.
Put 7 as the next digit of the answer. 
Result so far: 26567.96878147
Subtracting 6951 from 6980 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

The final result is 26567.96878147 with a remainder of 2.9e-08.