801894 divided by 91 
The aim is to understand the frequency of 91 in 801894.

Going ahead to step 1:
91 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 91

Step 2:
When dividing 80 by 91, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 91

Step 3:
91 goes into 801 8 times with a remainder of 73.
The next digit of our result is 8. 
Result so far: 8.0
Deduct 728 from 801 and we're left with 73.
Grab the next digit (8) from the dividend, add it to 73, then carry on: 738 / 91

Step 4:
The number 91 fits into 738 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 88.0
If we take 728 away from 738, we end up with 10.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 91

Advancing to step 5:
91 goes into 109 1 times with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 881.0
Subtracting 91 from 109 leaves us with 18.
Grab the next digit (4) from the dividend, add it to 18, then carry on: 184 / 91

Advancing to step 6:
When dividing 184 by 91, we get 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 8812.0
Subtract 182 from 184 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
If we divide 20 by 91, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 8812.0
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
91 can be fit into 200 2 times, resulting in a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 8812.02
If we take 182 away from 200, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 9:
If we divide 180 by 91, we get 1 and a remainder of 89.
The next digit of our result is 1. 
Result so far: 8812.021
Deduct 91 from 180 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 10:
890 divided by 91 is 9 with a remainder of 71.
The next digit of our result is 9. 
Result so far: 8812.0219
Deduct 819 from 890 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 11:
The number 91 fits into 710 7 times, leaving a remainder of 73.
Put 7 as the next digit of the answer. 
Result so far: 8812.02197
Deduct 637 from 710 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 12:
When dividing 730 by 91, we get 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 8812.021978
The remainder is 2 after subtracting 728 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 13:
If we divide 20 by 91, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 8812.021978
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 14:
When dividing 200 by 91, we get 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 8812.02197802
Subtract 182 from 200 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 8812.02197802 and a remainder of 1.8e-08.