Tables :: Many To Many Relationship - How To Add New Data

I have created a many-to-many relationship but am now having trouble figuring out how to add new data.

I have a table PEOPLE:
ID First Name Last Name
1 Participant A
2 Participant B
3 Participant C

And I have a table BEHAVIORS:
ID Behavior
1 Yelling
2 Grabbing
3 Smearing feces

And I linked these together in a many-to-many relationship in a table PEOPLE_BEHAVIORS:
ID Participant Behavior
1 A Yelling
2 B Yelling
3 C Yelling
4 A Grabbing
5 B Grabbing
6 A Smearing feces
7 C Smearing feces

All that's good to go. But now I need a table so I can count how often these behaviors occur every day. I need to link PEOPLE_BEHAVIORS to a new data table that will count how often I see the behaviors linked to the people every day. So my table should look like:

ID Participant Behavior Date Frequency

But I should only document the frequency of the behaviors linked to that participant (so for Participant A, I should have a space for yelling, grabbing, and smearing feces whereas for Participant B, I,d only have a space for yelling and grabbing). Is it possible to create a table that will basically partially create records for me? So if I open the table to add data today, I'd see the following and fill in the frequency blanks?

ID Participant Behavior Date Frequency
1 A Yelling 6/16/14
2 B Yelling 6/16/14
3 C Yelling 6/16/14
4 A Grabbing 6/16/14
5 B Grabbing 6/16/14
6 A Smearing feces 6/16/14
7 C Smearing feces 6/16/14