CLICK ON BARS FOR [ ENVIRONMENT ] IN CONTEXT (HELP)
SECTION 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s
 
PER MIL 8.1 11.1 10.5 12.0 23.6 43.5 45.8 67.3 64.4
SIZE (MW) 73.1 72.3 74.0 72.7 71.4 101.9 100.7 101.7 59.2
FREQ 62 138 167 236 481 299 386 645 445

These are the results for [ environment ]

 1  

Each bar indicates the relative frequency of the word, group of words, phrase, or grammatical constructions in each of the nine decades in the corpus -- the 1920s through the 2000s. If the search was for an exact word or string, then click on this bar to see the Keyword in Context display. If not, then you can click on this bar to see a list of matching words or strings, sorted by the section on which you click.
 2

The frequency of the matching strings per million words (normalized, to permit comparison across registers)
 3

The size of the section in millions of words
 4

The raw frequency of the matching strings in each register.