216346 divided by 91 
The aim is to understand the frequency of 91 in 216346.

Let's proceed to step 1:
91 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 91

Step 2:
21 divided by 91 is 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (6) from the dividend to 21 and continue with: 216 / 91

On to step 3:
91 goes into 216 2 times with a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 182 from 216 to get 34.
Take the next digit (3) from the dividend and append it to 34, then repeat: 343 / 91

Advancing to step 4:
91 can be fit into 343 3 times, resulting in a remainder of 70.
Use 3 as the next digit of our solution. 
Result so far: 23.0
If we take 273 away from 343, we end up with 70.
Append the next digit (4) from the dividend to 70 and continue with: 704 / 91

Advancing to step 5:
If we divide 704 by 91, we get 7 and a remainder of 67.
The next digit of our result is 7. 
Result so far: 237.0
Subtracting 637 from 704 leaves us with 67.
Fetch the next digit (6) from the dividend, attach it to 67 and continue: 676 / 91

Moving on to step 6:
The number 91 fits into 676 7 times, leaving a remainder of 39.
Record the quotient 7 as the next digit in the result. 
Result so far: 2377.0
If we take 637 away from 676, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 7:
When dividing 390 by 91, we get 4 with a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 2377.4
Subtract 364 from 390 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 8:
The number 91 fits into 260 2 times, leaving a remainder of 78.
Record the quotient 2 as the next digit in the result. 
Result so far: 2377.42
The remainder is 78 after subtracting 182 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 9:
91 goes into 780 8 times with a remainder of 52.
The next digit of our result is 8. 
Result so far: 2377.428
If we take 728 away from 780, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 10:
If we divide 520 by 91, we get 5 and a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 2377.4285
Subtract 455 from 520 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 11:
If we divide 650 by 91, we get 7 and a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 2377.42857
Deduct 637 from 650 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 12:
The number 91 fits into 130 1 times, leaving a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 2377.428571
Deduct 91 from 130 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 13:
If we divide 390 by 91, we get 4 and a remainder of 26.
The next digit of our result is 4. 
Result so far: 2377.4285714
The remainder is 26 after subtracting 364 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 14:
If we divide 260 by 91, we get 2 and a remainder of 78.
The number 2 becomes the next digit in our result. 
Result so far: 2377.42857142
Subtract 182 from 260 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

The final outcome is 2377.42857142, with a leftover of 7.8e-08.