91118809 ÷ 642 
The aim is to understand the frequency of 642 in 91118809.

Advancing to step 1:
When dividing 9 by 642, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 642

Let's proceed to step 2:
91 divided by 642 is 0 with a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Take the next digit (1) from the dividend and append it to 91, then repeat: 911 / 642

On to step 3:
When dividing 911 by 642, we get 1 with a remainder of 269.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 642 from 911 to get 269.
Append the next digit (1) from the dividend to 269 and continue with: 2691 / 642

Let's proceed to step 4:
When dividing 2691 by 642, we get 4 with a remainder of 123.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
If we subtract 2568 from 2691, we get 123.
Include the next digit (8) from the dividend after 123, then repeat: 1238 / 642

Going ahead to step 5:
The number 642 fits into 1238 1 times, leaving a remainder of 596.
Put 1 as the next digit of the answer. 
Result so far: 141.0
Subtracting 642 from 1238 leaves us with 596.
Bring next digit (8) of the dividend behind the 596 and repeat the process: 5968 / 642

Let's proceed to step 6:
When dividing 5968 by 642, we get 9 with a remainder of 190.
The next digit of our result is 9. 
Result so far: 1419.0
Deduct 5778 from 5968 and we're left with 190.
Include the next digit (0) from the dividend after 190, then repeat: 1900 / 642

Going ahead to step 7:
642 goes into 1900 2 times with a remainder of 616.
Put 2 as the next digit of the answer. 
Result so far: 14192.0
Subtract 1284 from 1900 to get 616.
Include the next digit (9) from the dividend after 616, then repeat: 6169 / 642

Going ahead to step 8:
642 can be fit into 6169 9 times, resulting in a remainder of 391.
The next digit of our result is 9. 
Result so far: 141929.0
If we take 5778 away from 6169, we end up with 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Going ahead to step 9:
3910 divided by 642 is 6 with a remainder of 58.
Record the quotient 6 as the next digit in the result. 
Result so far: 141929.6
If we take 3852 away from 3910, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 10:
642 goes into 580 0 times with a remainder of 580.
The next digit of our result is 0. 
Result so far: 141929.6
Deduct 0 from 580 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Moving on to step 11:
The number 642 fits into 5800 9 times, leaving a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 141929.609
If we take 5778 away from 5800, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 12:
220 divided by 642 is 0 with a remainder of 220.
Record the quotient 0 as the next digit in the result. 
Result so far: 141929.609
If we subtract 0 from 220, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 13:
2200 divided by 642 is 3 with a remainder of 274.
Use 3 as the next digit of our solution. 
Result so far: 141929.60903
Subtracting 1926 from 2200 leaves us with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Going ahead to step 14:
The number 642 fits into 2740 4 times, leaving a remainder of 172.
Record the quotient 4 as the next digit in the result. 
Result so far: 141929.609034
If we subtract 2568 from 2740, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 15:
642 goes into 1720 2 times with a remainder of 436.
The number 2 becomes the next digit in our result. 
Result so far: 141929.6090342
Subtracting 1284 from 1720 leaves us with 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Advancing to step 16:
When dividing 4360 by 642, we get 6 with a remainder of 508.
Record the quotient 6 as the next digit in the result. 
Result so far: 141929.60903426
Subtract 3852 from 4360 to get 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

In conclusion, the division gives 141929.60903426 with a balance of 5.08e-07.