Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of the most common English words and phrases over the
  centuries   By determining which were the most common English words and phrases since the
beginning of the 16th century, we obtain a unique large-scale view of the
evolution of written text. We find that the most common words and phrases in
any given year had a much shorter popularity lifespan in the 16th than they had
in the 20th century. By measuring how their usage propagated across the years,
we show that for the past two centuries the process has been governed by linear
preferential attachment. Along with the steady growth of the English lexicon,
this provides an empirical explanation for the ubiquity of the Zipf's law in
language statistics and confirms that writing, although undoubtedly an
expression of art and skill, is not immune to the same influences of
self-organization that are known to regulate processes as diverse as the making
of new friends and World Wide Web growth.

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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: econ