We're dividing 121723 by 81 
The aim is to understand the frequency of 81 in 121723.

Moving on to step 1:
The number 81 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 81

Advancing to step 2:
If we divide 12 by 81, we get 0 and a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 81

Step 3:
81 goes into 121 1 times with a remainder of 40.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 81 from 121 leaves us with 40.
Take the next digit (7) from the dividend and append it to 40, then repeat: 407 / 81

Advancing to step 4:
If we divide 407 by 81, we get 5 and a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtracting 405 from 407 leaves us with 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 81

Moving on to step 5:
81 can be fit into 22 0 times, resulting in a remainder of 22.
Write down 0 as next digit of the result. 
Result so far: 150.0
If we subtract 0 from 22, we get 22.
Fetch the next digit (3) from the dividend, attach it to 22 and continue: 223 / 81

Moving on to step 6:
223 divided by 81 is 2 with a remainder of 61.
Record the quotient 2 as the next digit in the result. 
Result so far: 1502.0
Deduct 162 from 223 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 7:
If we divide 610 by 81, we get 7 and a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 1502.7
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 8:
430 divided by 81 is 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 1502.75
Subtract 405 from 430 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 9:
81 can be fit into 250 3 times, resulting in a remainder of 7.
The next digit of our result is 3. 
Result so far: 1502.753
If we subtract 243 from 250, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 10:
70 divided by 81 is 0 with a remainder of 70.
The next digit of our result is 0. 
Result so far: 1502.753
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 11:
The number 81 fits into 700 8 times, leaving a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 1502.75308
Subtract 648 from 700 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 12:
81 goes into 520 6 times with a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 1502.753086
Subtracting 486 from 520 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 13:
340 divided by 81 is 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 1502.7530864
Subtracting 324 from 340 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
81 can be fit into 160 1 times, resulting in a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 1502.75308641
Subtract 81 from 160 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The final outcome is 1502.75308641, with a leftover of 7.9e-08.