73617691 divided by 642 
The aim is to understand the frequency of 642 in 73617691.

Going ahead to step 1:
642 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 642

Going ahead to step 2:
The number 642 fits into 73 0 times, leaving a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 73 after subtracting 0 from 73.
Bring next digit (6) of the dividend behind the 73 and repeat the process: 736 / 642

Going ahead to step 3:
If we divide 736 by 642, we get 1 and a remainder of 94.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 642 from 736 to get 94.
Append the next digit (1) from the dividend to 94 and continue with: 941 / 642

Moving on to step 4:
642 can be fit into 941 1 times, resulting in a remainder of 299.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 299 after subtracting 642 from 941.
Include the next digit (7) from the dividend after 299, then repeat: 2997 / 642

Going ahead to step 5:
The number 642 fits into 2997 4 times, leaving a remainder of 429.
Record the quotient 4 as the next digit in the result. 
Result so far: 114.0
Subtract 2568 from 2997 to get 429.
Grab the next digit (6) from the dividend, add it to 429, then carry on: 4296 / 642

Moving on to step 6:
642 goes into 4296 6 times with a remainder of 444.
Put 6 as the next digit of the answer. 
Result so far: 1146.0
Subtract 3852 from 4296 to get 444.
Include the next digit (9) from the dividend after 444, then repeat: 4449 / 642

Step 7:
The number 642 fits into 4449 6 times, leaving a remainder of 597.
Write down 6 as next digit of the result. 
Result so far: 11466.0
The remainder is 597 after subtracting 3852 from 4449.
Take the next digit (1) from the dividend and append it to 597, then repeat: 5971 / 642

Moving on to step 8:
The number 642 fits into 5971 9 times, leaving a remainder of 193.
Put 9 as the next digit of the answer. 
Result so far: 114669.0
The remainder is 193 after subtracting 5778 from 5971.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Let's proceed to step 9:
The number 642 fits into 1930 3 times, leaving a remainder of 4.
The next digit of our result is 3. 
Result so far: 114669.3
Subtract 1926 from 1930 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
If we divide 40 by 642, we get 0 and a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 114669.3
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 11:
When dividing 400 by 642, we get 0 with a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 114669.3
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 114669.3, with a leftover of 0.04.