Letter frequency ER IN ON AT ND ST ES EN OF TE ED OR TI HI AS TO", and the most common doubled letters as "LL EE SS OO TT FF RR NN PP CC". Also, to note that different dialects of a language will also affect a letter's frequency. For example, an author in the United States would produce something in which the letter 'z' is more common than an author in the United Kingdom writing on the same topic: words like "analyze", "apologize", and "recognize" contain the letter in American English, whereas the same words are spelled "analyse", "apologise", and
English words of Greek origin to recognize words of Greek origin, and give hints as to their pronunciation and inflection. Some romanizations are not completely standard. The Ancient Greek diphthongs and may be spelled in three different ways in English: the digraphs "ae" and "oe"; the ligatures "æ" and "œ"; and the simple letter "e". The ligatures have largely fallen out of use worldwide; the digraphs are uncommon in American usage, but remain common in British usage. The spelling depends mostly on the variety of English, not on the particular word. Examples are: "encyclopaedia" / "encyclopædia" / "encyclopedia", "haemoglobin" / "hæmoglobin" / "hemoglobin", "oedema" /