Table 1.

Examples of n-grams having high correlations between their trend frequencies in tweets and Google search queries.

N-gram	Period (start date to end date)	Pearson correlation	P value
get, second, dose	January 04, 2021, to April 30, 2021	0.91	<.001
get, first, vaccine, shot	January 18, 2021, to April 25, 2021	0.89	<.001
second, vaccine	February 01, 2021, to April 30, 2021	0.86	<.001
flu, symptom	January 01, 2020, to April 04, 2021	0.85	<.001
covid, vaccine	January 20, 2020, to April 30, 2021	0.85	<.001
think, flu	January 01, 2020, to March 30, 2020	0.84	<.001
second, dose, vaccine	January 04, 2021, to April 30, 2021	0.84	<.001
get, second, vaccine	February 01, 2021, to April 30, 2021	0.84	<.001
get, covid, vaccine	March 30, 2020, to April 30, 2021	0.84	<.001
get, vaccine	January 01, 2020, to April 30, 2021	0.80	<.001