Re-add info about idiom frequencies

README.md

@@ -27,6 +27,11 @@ The idioms are split into idiom starts (the first N-1 words) and accepted comple
 
 This dataset can be used to measure a generative language models' ability to complete well known idioms, or as a masked language modelling task. 
 
+## Idiom frequencies
+`idiom_freqs/all_idioms_freq.json` contain all the idioms and their frequency in the online library as key,value pairs  
+`idiom_freqs/nno_idioms_freq.json` contain the Nynorsk idioms and their frequency in the online library as key,value pairs  
+`idiom_freqs/nob_idioms_freq.json` contain the Bokmål idioms and their frequency in the online library as key,value pairs  
+
 
 ## Idiom graphs
 There is considerable linguistic overlap between the idioms. For example, though there are 3537 unique idioms, there are only 796 unique starter words.  
@@ -65,7 +70,7 @@ Here is a tree where "alt" is the root, the idioms "alt er bare fryd og gammen",
 These trees can be found in `idiom_graphs/`.  
 
 There are also flat versions of the trees (where consecutive nodes/words with only one child are merged into word sequences)
-    
+
 Example:
 ```json
 "alt": {