docstr: Calculate freq delta
  
  Parameters
  ----------
  left_frq: str
  right_freq: str
  
  Returns
  -------
docstr_tok: ["Calculate","freq","delta","Parameters","--","--","--","--","--","left_frq",":","str","right_freq",":","str","Returns","--","--","--","-"]
code: def get_min_delta(left_frq: str, right_freq: str):
      """Calculate freq delta
  
      Parameters
      ----------
      left_frq: str
      right_freq: str
  
      Returns
      -------
  
      """
      minutes_map = {
          Freq.NORM_FREQ_MINUTE: 1,
          Freq.NORM_FREQ_DAY: 60 * 24,
          Freq.NORM_FREQ_WEEK: 7 * 60 * 24,
          Freq.NORM_FREQ_MONTH: 30 * 7 * 60 * 24,
      }
      left_freq = Freq(left_frq)
      left_minutes = left_freq.count * minutes_map[left_freq.base]
      right_freq = Freq(right_freq)
      right_minutes = right_freq.count * minutes_map[right_freq.base]
      return left_minutes - right_minutes
  
imports: import bisect
  from datetime import datetime, time, date, timedelta
  from typing import List, Optional, Tuple, Union
  import functools
  import re
  import pandas
  from qlib.config import C
  from qlib.constant import REG_CN, REG_TW, REG_US
label_desc: Use image node_id 7 for calling the Freq obj's underlying member method code with example usage: obj.get_min_delta(left_frq, right_freq) and returns: unknown