Q. Show the Media-Availability in advertising?

Media-Availability: Sometimes it is probable that desired space for advertisements in print media is already booked by some other advertiser. For instance advertiser wants to issue an advertisement on front page of newspaper or on the cover-page of any magazine however this space is already booked by some other advertises then this media isn't available to the advertiser and he will plan for some other media or he will have to change timing of advertisement. Likewise if an advertisement is to be issued on television during a particular programme then it is possible that advertising time isn't available on that programme as it may have been booked/sponsored by other advertisers. Thus media-availability should be considered for media planning.