Looks to me like your data structures are arse backwards. Consider:

use strict;
use warnings;

my %triggers;
@triggers{qw(bodi forc twice mass acceler law)} = (1);

my @UnNum =
    (
    [35, [qw(forc two bodi twice strong on bodi sai bodi mass)]],
    [39, [qw(you expect on think new bodi made two bodi origin)]],
    [60, [qw(attract bodi b origin force)]],
    [46, [qw(total forc b twice origin force)]],
    [34, [qw(sai on bodi twice mass three time mass forc six)]],
    [17, [qw(on now see why bodi fall same rate bodi twice)]],
    );

for (@UnNum) {
    my $count = \$_->[0];
    
    exists $triggers{$_} && ++$$count for @{$_->[1]};
}

print join "\n", map {"$_->[0]: " . join ' ', @{$_->[1]}} @UnNum;
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Prints:

41: forc two bodi twice strong on bodi sai bodi mass
41: you expect on think new bodi made two bodi origin
61: attract bodi b origin force
48: total forc b twice origin force
39: sai on bodi twice mass three time mass forc six
20: on now see why bodi fall same rate bodi twice
[download]