interlace vs interlock

interlace

verb
  • To cross one with another. 

  • To cross one another as if woven together; to intertwine; to blend intricately. 

  • To mingle; to blend. 

noun
  • A technique of improving the picture quality of a video signal primarily on CRT devices without consuming extra bandwidth. 

  • A decorative element found especially in early medieval art 

interlock

verb
  • To interlace. 

  • To fit or clasp together securely. 

noun
  • A safety device that prevents activation in unsafe conditions. 

How often have the words interlace and interlock occurred in a corpus of books? (source: Google Ngram Viewer )