334393 ÷ 81 
The aim is to understand the frequency of 81 in 334393.

Moving on to step 1:
81 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 81

Step 2:
When dividing 33 by 81, we get 0 with a remainder of 33.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 33, we end up with 33.
Take the next digit (4) from the dividend and append it to 33, then repeat: 334 / 81

Advancing to step 3:
If we divide 334 by 81, we get 4 and a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 324 from 334 to get 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 81

On to step 4:
81 can be fit into 103 1 times, resulting in a remainder of 22.
The next digit of our result is 1. 
Result so far: 41.0
If we take 81 away from 103, we end up with 22.
Include the next digit (9) from the dividend after 22, then repeat: 229 / 81

Step 5:
The number 81 fits into 229 2 times, leaving a remainder of 67.
The number 2 becomes the next digit in our result. 
Result so far: 412.0
The remainder is 67 after subtracting 162 from 229.
Grab the next digit (3) from the dividend, add it to 67, then carry on: 673 / 81

Step 6:
81 can be fit into 673 8 times, resulting in a remainder of 25.
Put 8 as the next digit of the answer. 
Result so far: 4128.0
Deduct 648 from 673 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 7:
When dividing 250 by 81, we get 3 with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 4128.3
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.

Going ahead to step 8:
81 goes into 70 0 times with a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 4128.3
If we take 0 away from 70, we end up 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 9:
When dividing 700 by 81, we get 8 with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 4128.308
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.

Moving on to step 10:
81 goes into 520 6 times with a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 4128.3086
Subtract 486 from 520 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 11:
340 divided by 81 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 4128.30864
If we subtract 324 from 340, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 12:
The number 81 fits into 160 1 times, leaving a remainder of 79.
The next digit of our result is 1. 
Result so far: 4128.308641
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.

On to step 13:
The number 81 fits into 790 9 times, leaving a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 4128.3086419
Deduct 729 from 790 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.

Moving on to step 14:
When dividing 610 by 81, we get 7 with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 4128.30864197
If we subtract 567 from 610, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final outcome is 4128.30864197, with a leftover of 4.3e-08.