4d51ede8_rks_Search_UI_2_9___Lucidworks__Description
[Parameter] Index Term Frequencies and Positions [Fields API Attribute Name] Two parameters: omit_tf and omit_positions [Description] 
This setting controls if the number of times a term appears in a document (term frequency) or the proximity of terms to other terms in the document (position) will be indexed. This information is important for operation of boosting and proximity searching. On text fields, term frequency and positions should be indexed, but the decision is dependent on how the field will be used for queries and/or display of results. Three options are available: none: no term frequency or position information will be stored in the index. term frequencies: only the frequency of terms will be stored in the index. term frequencies and positions: both frequency of terms and their positions will be stored.
Field Configuration - LucidWorks Search UI 2.9 - Lucidworks
Description