The time of duplicate checking of periodical papers is judged according to the periodical publishing cycle, but the efficiency of duplicate checking is also affected. If the selected journal is bimonthly (publication cycle is 15 days), it should be at least 2 months in advance to allow sufficient time for subsequent expert review and revision.
Generally speaking, the contributions of ordinary journals are relatively large, so it may be two or three months before it is their turn to review the papers. For the effectiveness of the journal, it is suggested to know the publication of the paper in advance and ask about the duplicate checking and development of the paper. The workload of duplicate checking of core journals is not very large. After all, papers submitted to core journals need higher academic ability. Generally speaking, people who choose senior titles will choose core journals, and academic professors will also ask for core journals. Therefore, the repetition rate of core journals will be higher. Many requirements are within 10% or 5%, and ordinary journals are qualified within 20%. Periodicals require that the duplicate checking system for detecting papers is generally an internal duplicate checking system, and a few will choose the first draft of paperfree, but both are very accurate and scientific.