How does Google autocompletethis query?

my best friend is a

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• 

  

  my best friend is a

  10,000
• 

  

  my best friend is a

  9,000
• 

  

  my best friend is a

  8,000
• 

  

  my best friend is a

  7,000
• 

  

  my best friend is a

  6,000
• 

  

  my best friend is a

  5,000
• 

  

  my best friend is a

  4,000
• 

  

  my best friend is a

  3,000
• 

  

  my best friend is a

  2,000
• 

  

  my best friend is a

  1,000

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