Abstract: This paper provides a comprehensive research on time series analysis of four search engines viz., Google, Bing, Yahoo! and Baidu using simple keyword “Plagiarism” from the field of Library and Information Science. The time series analysis is used to forecast result fluctuation using series of data which was collected on daily basis for about 100 Days, to generate 50 days of projected data, and latter a trend line was used to compare the forecast of select search engines. The evaluation reveal that Bing shows a positive secular trend while Baidu, Yahoo! and Google show a downward or negative secular trend.