?共现

共现（co-occurrence）：属于同一词汇搭配范畴或者某一领域的词汇。

?同现

随机性研究的一个重要课题就是同现（co-occurrence）研究。李晓明（1985：10-11）指出：

?共现关系

 Co-occurrence (共现关系): By relations of co-occurrence one means that words of different sets or classes may permit, or require, the occurrence...

?出现

共同出现（Co-Occurrence）是Apache Mahout可以计算被推荐物品显著性标识的基础。