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How do visualize the rise or decline of occurrence of a word in a data set with timestamps [closed]

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Im trying to make a graph like this (actually single line for simplicity sake) enter image description here

Given an input word like 'M4M" and a data set file (csv) like this

1529972216.0,Seeking Black M4M
1529972047.0,Looking for car fun 
1529971885.0,armenian M4M

How can I visualize the trend of the given word? I want to chart the occurrence of the word over the time span, to be able to tell if the word/topic is declining or increasing in popularity.

(the data set is a csv file containing in field 1 the unix epoch timestamp of craigslist posts and in field 2 the title of the craiglist posts)

In my system I have R and gnu plot installed (if that helps)
In any given day, hundreds of craiglist posts can be there.


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